java.lang.Object
- org.meteoinfo.ndarray.math.ArrayUtil

```
public class ArrayUtil
extends Object
```
作者:

yaqiang

构造器概要

构造器
构造器说明

ArrayUtil()

方法概要

所有方法静态方法实例方法具体方法
修饰符和类型	方法	说明
`static Array`	`argSort(Array a, Integer axis)`	Get sorted array index along an axis
`static Array`	`array(Object data)`	Create an array
`static Array`	`array(Object data, DataType dt)`	Create an array
`static Array`	`array_list(List data, DataType dt)`	Create an array
`static Array`	`arrayComplex(double[] real, double[] image)`	Create complex array from real and image data array
`static Array`	`arrayRange(Number start, Number stop, Number step)`	Array range
`static Array`	`arrayRange_bak(Number start, Number stop, Number step)`	Array range
`static Array`	`arrayRange1(Number start, int length, Number step)`	Array range
`static List<Array>`	`arraySplit(Array a, int sections, int axis)`	Split an Array
`static Array`	`broadcast(Array a, int[] shape)`	Broadcast array to a new shape
`static Array`	`broadcast(Array a, List<Integer> shape)`	Broadcast array to a new shape
`static int[]`	`broadcastShapes(List<List<Integer>> shapes)`	Broadcast shape list to a new shape
`static Array`	`concatenate(List<Array> arrays, Integer axis)`	Concatenate arrays to one array along an axis
`static Array`	`concatenate(Array a, Array b, Integer axis)`	Concatenate two arrays to one array along an axis
`static Array`	`convertEncoding(ArrayChar a, String encoding)`	Convert char array encoding from UTF-8
`static Array`	`convertToDataType(Array a, DataType dataType)`	Convert array to another data type
`static String`	`convertToString(Array a)`	Array to string
`protected static void`	`copyTo1DJavaArray(IndexIterator iter, Object javaArray)`
`protected static void`	`copyTo1DJavaArray(IndexIterator iter, Object javaArray, double missingValue)`
`protected static void`	`copyTo1DJavaArray_Long(IndexIterator iter, Object javaArray)`
`static Object`	`copyToNDJavaArray(Array a)`	Convert array to N-Dimension double Java array
`static Object`	`copyToNDJavaArray(Array a, String dtype)`	Convert array to N-Dimension double Java array
`static Object`	`copyToNDJavaArray_Double(Array a)`	Convert array to N-Dimension double Java array
`static Object`	`copyToNDJavaArray_Double(Array a, double missingValue)`	Convert array to N-Dimension double Java array
`static Object`	`copyToNDJavaArray_Long(Array a)`	Convert array to N-Dimension double Java array
`static EndianDataOutputStream`	`createBinFile(String fn)`	Create a binary file
`static Array`	`cressman(List<Number> x_s, List<Number> y_s, Array v_s, List<Number> X, List<Number> Y, List<Number> radList)`	Cressman analysis
`static Array`	`cressman_bak(List<Number> x_s, List<Number> y_s, Array v_s, List<Number> X, List<Number> Y, List<Number> radList)`	Cressman analysis
`static String`	`dataTypeString(DataType dt)`	Get data type string
`static Array`	`delete(Array a, int idx, int axis)`	Return a new array with sub-arrays along an axis deleted
`static Array`	`delete(Array a, List<Integer> idx, int axis)`	Return a new array with sub-arrays along an axis deleted
`static Array`	`diag(Array a, int k)`	Extract a diagonal or construct a diagonal array.
`static Array`	`empty(List<Integer> shape, DataType dtype)`	Get zero array
`static Array[]`	`extendHalfCell(Array x, Array y)`	Extend the grid to half cell, so the grid points are the centers of the cells
`static Array`	`eye(int n, int m, int k, DataType dtype)`	Return a 2-D array with ones on the diagonal and zeros elsewhere.
`static Object[]`	`findIndices(List<List<Number>> points, List<Number> xi)`	Find indices
`static Object[]`	`findIndices(List<Array> points, Array xi)`	Find indices
`static Array`	`flatNonZero(Array a)`	Return the flat indices of the elements that are non-zero.
`static Array`	`fromBuffer(byte[] buffer, DataType dataType, int count, int offset)`	Read array from a buffer byte array
`static Array`	`fromBuffer(byte[] buffer, DataType dataType, int count, int offset, String byteOrder)`	Read array from a buffer byte array
`static Array`	`full(int[] shape, Object fillValue, DataType dtype)`	Return a new array of given shape and type, filled with fill value.
`static Array`	`full(List<Integer> shape, Object fillValue, DataType dtype)`	Return a new array of given shape and type, filled with fill value.
`static Array`	`full(List<Integer> shape, Array fillValue, DataType dtype)`	Return a new array of given shape and type, filled with fill value.
`static int`	`getDimIndex(Array dim, Number v)`	Get value index in a dimension array
`static String`	`getString(ArrayChar a, String encoding)`	Get string from a char array
`static int[]`	`gridIndex(double[][] xdim, double[][] ydim, double x, double y)`	Get grid array x/y value index
`static int[]`	`gridIndex(Array xdim, Array ydim, double x, double y)`	Get grid array x/y value index
`static List<Array>`	`histogram(Array a, double[] bins)`	Histogram x/y array
`static List<Array>`	`histogram(Array a, int nbins)`	Histogram x/y array
`static List<Array>`	`histogram(Array a, Array bins)`	Histogram x/y array
`static Array`	`identity(int n, DataType dtype)`	Return the identity array - a square array with ones on the main diagonal.
`static Array`	`interpn(List<Array> points, Array values, List<Array> xi)`	Multidimensional interpolation on regular grids.
`static Object`	`interpn(List<Array> points, Array values, Array xi)`	Multidimensional interpolation on regular grids.
`static double`	`interpn_s(List<List<Number>> points, Array values, List<Number> xi)`	Multidimensional interpolation on regular grids.
`static double`	`interpn_s(List<Array> points, Array values, Array xi)`	Multidimensional interpolation on regular grids.
`Array`	`interpolate(Array a, List<Number> X, List<Number> Y)`	Interpolate array data
`static Array`	`interpolate_1d(double x, Array xp, Array a, int axis)`	Interpolates data with any shape over a specified axis.
`static Array`	`interpolate_1d(Array xa, Array xp, Array a, int axis)`	Interpolates data with any shape over a specified axis.
`static Array`	`interpolation_Inside(List<Number> x_s, List<Number> y_s, Array a, List<Number> X, List<Number> Y)`	Interpolate with inside method - The grid cell value is the average value of the inside points or fill value if no inside point.
`static Object`	`interpolation_Inside_Count(List<Number> x_s, List<Number> y_s, List<Number> X, List<Number> Y, boolean pointDensity, boolean centerPoint)`	Interpolate with inside method - The grid cell value is the count number of the inside points or fill value if no inside point.
`static Array`	`interpolation_Inside_Max(List<Number> x_s, List<Number> y_s, Array a, List<Number> X, List<Number> Y)`	Interpolate with inside method - The grid cell value is the maximum value of the inside points or fill value if no inside point.
`static Array`	`interpolation_Inside_Mean(Array x_s, Array y_s, Array a, Array X, Array Y, boolean center)`	Interpolate with inside method - The grid cell value is the average value of the inside points or fill value if no inside point.
`static Array`	`interpolation_Inside_Min(List<Number> x_s, List<Number> y_s, Array a, List<Number> X, List<Number> Y)`	Interpolate with inside method - The grid cell value is the minimum value of the inside points or fill value if no inside point.
`static Array`	`interpolation_Nearest_1(List<Number> x_s, List<Number> y_s, Array a, List<Number> X, List<Number> Y, double radius, double fill_value)`	Interpolate with the nearest method
`static Array`	`interpolation_Nearest_bak(List<Number> x_s, List<Number> y_s, Array a, List<Number> X, List<Number> Y, double radius)`	Interpolate with nearest method
`static boolean`	`isUnique(Array a, int limit)`	Check array is unique by unique value number
`static Array`	`lineSpace(Number start, Number stop, int n)`	Array line space - stop is included
`static Array`	`lineSpace(Number start, Number stop, int n, boolean endpoint)`	Array line space
`static Array`	`lineSpace_bak(Number start, Number stop, int n, boolean endpoint)`	Array line space
`static Array`	`linint2(Array a, Array X, Array Y, Array newX, Array newY)`	Interpolates from a rectilinear grid to another rectilinear grid using bilinear interpolation.
`static Array`	`magic(int n)`	Generate magic 2D array
`static DataType`	`mergeDataType(DataType dt1, DataType dt2)`	Merge data type to one data type
`static Array[]`	`meshgrid(Array x)`	Mesh grid
`static Array[]`	`meshgrid(Array... xs)`	Mesh grid
`static Array[]`	`meshgrid(Array x, Array y)`	Mesh grid
`static List<Array>`	`nonzero(Array a)`	Return the indices of the elements that are non-zero.
`static int`	`numASCIICol(String fileName, String delimiter, int headerLines)`	Get row number of an ASCII file
`static int`	`numASCIIRow(String fileName)`	Get row number of a ASCII file
`static Array`	`ones(int n)`	Get ones array
`static Array`	`ones(List<Integer> shape, DataType dtype)`	Get ones array
`static double`	`rand()`	Get random value
`static Array`	`rand(int n)`	Get random array - one dimension
`static Array`	`rand(List<Integer> shape)`	Get random array
`static Array`	`readASCIIFile(String fileName, String delimiter, int headerLines, String dataType, List<Integer> shape, boolean readFirstCol)`	Read ASCII data file to an array
`static Array`	`readASCIIFile(String fileName, String delimiter, int headerLines, DataType dataType, List<Integer> shape, boolean readFirstCol)`	Read ASCII data file to an array
`static Array`	`readASCIIFile(String fileName, DataType dataType, int count, String delimiter)`	Read ASCII data file to an array
`static Array`	`readBinFile(String fn, List<Integer> dims, String dataType, int skip, String byteOrder)`	Read array from a binary file
`static Array`	`readBinFile(String fn, DataType dataType, int count, int offset)`	Read array from a binary file
`static Array`	`readBinFile(String fn, DataType dataType, int count, int offset, String byteOrder)`	Read array from a binary file
`static Array`	`repeat(Number v, int n)`	Repeat a value n times
`static Array`	`repeat(Array a, List<Integer> repeats)`	Repeat elements of an array.
`static Array`	`repeat(Array a, List<Integer> repeats, int axis)`	Repeat elements of an array.
`static Array`	`resample_Bilinear(Array a, List<Number> X, List<Number> Y, List<Number> newX, List<Number> newY)`	Resample grid array with bilinear method
`static Array`	`resample_Bilinear(Array a, Array X, Array Y, Array newX, Array newY)`	Resample grid array with bilinear method
`static Array`	`resample_Neighbor(Array a, Array X, Array Y, Array newX, Array newY)`	Resample grid array with neighbor method
`static void`	`saveASCIIFile(String fn, Array a, int colNum, String format, String delimiter)`	Save an array data to a ASCII file
`static void`	`saveBinFile(String fn, Array a, String byteOrder, boolean append, boolean sequential)`	Save an array data to a binary file
`static int`	`searchSorted(List<Number> a, double v)`	Search sorted list index
`static int`	`searchSorted(Array a, double v)`	Search sorted list index
`static int`	`searchSorted(Array a, Number v, boolean left)`	Find indices where elements should be inserted to maintain order.
`static Array`	`searchSorted(Array a, Array v, boolean left)`	Find indices where elements should be inserted to maintain order.
`static int[]`	`searchSorted1(Array a, double v)`	Search sorted list index
`static Array`	`slice(Array a, int axis, int idx)`	Get slice array along an axis
`static Array`	`slice(Array a, int axis, Array dim, double v)`	Get slice array along an axis
`static Array`	`smooth5(Array a)`	Smooth with 5 points
`static Array`	`smooth5(Array a, int rowNum, int colNum, double unDefData)`	Smooth with 5 points
`static Array`	`smooth9(Array a)`	Smooth with 9 points
`static Array`	`sort(Array a, Integer axis)`	Sort array along an axis
`static Array`	`tile(Number v, int n)`	Repeat a value n times
`static Array`	`tile(Number v, List<Integer> repeats)`	Repeat a value n times
`static Array`	`tile(Array a, List<Integer> repeats)`	Repeat elements of an array.
`static Array`	`toBoolean(Array a)`	Convert array to boolean type
`static DataType`	`toDataType(String dt)`	To data type - ucar.ma2
`static Array`	`toDate(Array a)`	Convert array to date type
`static Array`	`toDouble(Array a)`	Convert array to double type
`static Array`	`toeplitz(Array col, Array row)`	Returns a Toeplitz matrix in which each descending diagonal from left to right is constant.
`static Array`	`toFloat(Array a)`	Convert array to float type
`static Array`	`toInteger(Array a)`	Convert array to integer type
`static double`	`toStation(Array data, List<Number> xArray, List<Number> yArray, double x, double y)`	Interpolate data to a station point
`static double`	`toStation(Array data, List<Number> xArray, List<Number> yArray, double x, double y, double missingValue)`	Interpolate data to a station point
`static double`	`toStation(Array data, Array xArray, Array yArray, double x, double y)`	Interpolate data to a station point
`static double`	`toStation_Neighbor(Array data, List<Number> xArray, List<Number> yArray, double x, double y)`	Interpolate data to a station point
`static double`	`toStation_Neighbor(Array data, List<Number> xArray, List<Number> yArray, double x, double y, double missingValue)`	Interpolate data to a station point
`static double`	`toStation_Neighbor(Array data, Array xArray, Array yArray, double x, double y)`	Interpolate data to a station point
`static String`	`toString_old(Array a)`	Array to string
`static Array`	`unique(Array a, Integer axis)`	Find the unique elements of an array.
`static Array[]`	`uniqueIndex(Array a, Integer axis)`	Find the unique elements and index of an array.
`static Array`	`unPack(Array a, double missingValue, double scaleFactor, double addOffset)`	Unpack array by missing value, scale factor and add offset
`static Array`	`view(Array a)`	New view of array with the same data.
`static void`	`writeBinFile(EndianDataOutputStream outs, Array a, String byteOrder, boolean sequential)`	Save an array data to a binary file
`static Array`	`zeros(int n)`	Get zero array
`static Array`	`zeros(int[] shape, DataType dtype)`	Get zero array
`static Array`	`zeros(List<Integer> shape, String dtype)`	Get zero array
`static Array`	`zeros(List<Integer> shape, DataType dtype)`	Get zero array

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料
- ArrayUtil
```
public ArrayUtil()
```

方法详细资料

readASCIIFile

public static Array readASCIIFile(String fileName,
                                  String delimiter,
                                  int headerLines,
                                  String dataType,
                                  List<Integer> shape,
                                  boolean readFirstCol)
                           throws UnsupportedEncodingException,
                                  FileNotFoundException,
                                  IOException

Read ASCII data file to an array

参数:: fileName - File name; delimiter - Delimiter; headerLines - Headerline number; dataType - Data type string; shape - Shape; readFirstCol - Read first column data or not
返回:: Result array
抛出:: UnsupportedEncodingException; FileNotFoundException; IOException

readASCIIFile

public static Array readASCIIFile(String fileName,
                                  String delimiter,
                                  int headerLines,
                                  DataType dataType,
                                  List<Integer> shape,
                                  boolean readFirstCol)
                           throws UnsupportedEncodingException,
                                  FileNotFoundException,
                                  IOException

Read ASCII data file to an array

参数:: fileName - File name; delimiter - Delimiter; headerLines - Headerline number; dataType - Data type; shape - Shape; readFirstCol - Read first column data or not
返回:: Result array
抛出:: UnsupportedEncodingException; FileNotFoundException; IOException

readASCIIFile

public static Array readASCIIFile(String fileName,
                                  DataType dataType,
                                  int count,
                                  String delimiter)
                           throws UnsupportedEncodingException,
                                  FileNotFoundException,
                                  IOException

Read ASCII data file to an array

参数:: fileName - File name; dataType - Data type; count - Number of items to read; delimiter - Delimiter
返回:: Result array
抛出:: UnsupportedEncodingException; FileNotFoundException; IOException

numASCIIRow
```
public static int numASCIIRow(String fileName)
                       throws FileNotFoundException
```
Get row number of a ASCII file

参数:

fileName - File name

返回:

Row number

抛出:

FileNotFoundException

numASCIICol

public static int numASCIICol(String fileName,
                              String delimiter,
                              int headerLines)
                       throws FileNotFoundException,
                              IOException

Get row number of an ASCII file

参数:: fileName - File name; delimiter -; headerLines -
返回:: Row number
抛出:: FileNotFoundException; IOException

createBinFile

public static EndianDataOutputStream createBinFile(String fn)
                                            throws IOException

Create a binary file

参数:: fn - The file path
返回:: EndianDataOutputStream
抛出:: IOException

writeBinFile

public static void writeBinFile(EndianDataOutputStream outs,
                                Array a,
                                String byteOrder,
                                boolean sequential)

Save an array data to a binary file

参数:: outs - EndianDataOutputStream; a - Array; byteOrder - Byte order; sequential - If write as sequential binary file - Fortran

saveBinFile

public static void saveBinFile(String fn,
                               Array a,
                               String byteOrder,
                               boolean append,
                               boolean sequential)

Save an array data to a binary file

参数:: fn - File path; a - Array; byteOrder - Byte order; append - If append to existing file; sequential - If write as sequential binary file - Fortran

saveASCIIFile

public static void saveASCIIFile(String fn,
                                 Array a,
                                 int colNum,
                                 String format,
                                 String delimiter)
                          throws IOException

Save an array data to a ASCII file

参数:: fn - File path; a - Array; colNum - Column number of each line; format - String format; delimiter - Delimiter
抛出:: IOException

readBinFile

public static Array readBinFile(String fn,
                                List<Integer> dims,
                                String dataType,
                                int skip,
                                String byteOrder)

Read array from a binary file

参数:: fn - Binary file name; dims - Dimensions; dataType - Data type string; skip - Skip bytes; byteOrder - Byte order
返回:: Result array

readBinFile

public static Array readBinFile(String fn,
                                DataType dataType,
                                int count,
                                int offset)
                         throws IOException

Read array from a binary file

参数:: fn - Binary file name; dataType - Data type; count - Number of items to read. -1 means all items (i.e., the complete file); offset - Offset bytes
返回:: Result array
抛出:: IOException

readBinFile

public static Array readBinFile(String fn,
                                DataType dataType,
                                int count,
                                int offset,
                                String byteOrder)
                         throws IOException

Read array from a binary file

参数:: fn - Binary file name; dataType - Data type; count - Number of items to read. -1 means all items (i.e., the complete file); offset - Offset bytes; byteOrder - Byte order
返回:: Result array
抛出:: IOException

fromBuffer

public static Array fromBuffer(byte[] buffer,
                               DataType dataType,
                               int count,
                               int offset)

Read array from a buffer byte array

参数:: buffer - Buffer data; dataType - Data type; count - Number of items to read. -1 means all items (i.e., the complete file); offset - Offset bytes
返回:: Result array

fromBuffer

public static Array fromBuffer(byte[] buffer,
                               DataType dataType,
                               int count,
                               int offset,
                               String byteOrder)

Read array from a buffer byte array

参数:: buffer - Buffer data; dataType - Data type; count - Number of items to read. -1 means all items (i.e., the complete file); offset - Offset bytes; byteOrder - Byte order
返回:: Result array

array
```
public static Array array(Object data)
```
Create an array

参数:

data - Object

返回:

Array

array

public static Array array(Object data,
                          DataType dt)

Create an array

参数:: data - Object; dt - Data type
返回:: Array

arrayComplex
```
public static Array arrayComplex(double[] real,
                                 double[] image)
```
Create complex array from real and image data array

参数:

real - Real data array

image - Image data array

返回:

Complex array

array_list

public static Array array_list(List data,
                               DataType dt)

Create an array

参数:: data - Array like data; dt - Data type
返回:: Array

view
```
public static Array view(Array a)
```
New view of array with the same data.

参数:

a - Input array

返回:

View array

arrayRange_bak

public static Array arrayRange_bak(Number start,
                                   Number stop,
                                   Number step)

Array range

参数:: start - Start value; stop - Stop value; step - Step value
返回:: Array

arrayRange

public static Array arrayRange(Number start,
                               Number stop,
                               Number step)

Array range

参数:: start - Start value; stop - Stop value; step - Step value
返回:: Array

arrayRange1

public static Array arrayRange1(Number start,
                                int length,
                                Number step)

Array range

参数:: start - Start value; length - Length; step - Step value
返回:: Array

lineSpace

public static Array lineSpace(Number start,
                              Number stop,
                              int n)

Array line space - stop is included

参数:: start - Start value; stop - Stop value; n - Number value
返回:: Array

lineSpace

public static Array lineSpace(Number start,
                              Number stop,
                              int n,
                              boolean endpoint)

Array line space

参数:: start - Start value; stop - Stop value; n - Number value; endpoint - If stop is included
返回:: Array

lineSpace_bak

public static Array lineSpace_bak(Number start,
                                  Number stop,
                                  int n,
                                  boolean endpoint)

Array line space

参数:: start - Start value; stop - Stop value; n - Number value; endpoint - If stop is included
返回:: Array

zeros
```
public static Array zeros(int n)
```
Get zero array

参数:

n - Number

返回:

Array

zeros

public static Array zeros(List<Integer> shape,
                          String dtype)

Get zero array

参数:: shape - Shape; dtype - Data type
返回:: Array Result array

zeros

public static Array zeros(List<Integer> shape,
                          DataType dtype)

Get zero array

参数:: shape - Shape; dtype - Data type
返回:: Array Result array

zeros

public static Array zeros(int[] shape,
                          DataType dtype)

Get zero array

参数:: shape - Shape; dtype - Data type
返回:: Array Result array

empty

public static Array empty(List<Integer> shape,
                          DataType dtype)

Get zero array

参数:: shape - Shape; dtype - Data type
返回:: Array Result array

full

public static Array full(int[] shape,
                         Object fillValue,
                         DataType dtype)

Return a new array of given shape and type, filled with fill value.

参数:: shape - Shape; fillValue - Fill value; dtype - Data type
返回:: Array Result array

full

public static Array full(List<Integer> shape,
                         Object fillValue,
                         DataType dtype)

Return a new array of given shape and type, filled with fill value.

参数:: shape - Shape; fillValue - Fill value; dtype - Data type
返回:: Array Result array

full

public static Array full(List<Integer> shape,
                         Array fillValue,
                         DataType dtype)

Return a new array of given shape and type, filled with fill value.

参数:: shape - Shape; fillValue - Fill value array; dtype - Data type
返回:: Array Result array

ones
```
public static Array ones(int n)
```
Get ones array

参数:

n - Number

返回:

Array Result array

ones

public static Array ones(List<Integer> shape,
                         DataType dtype)

Get ones array

参数:: shape - Shape; dtype - Data type
返回:: Array Result array

identity
```
public static Array identity(int n,
                             DataType dtype)
```
Return the identity array - a square array with ones on the main diagonal.

参数:

n - Number of rows (and columns) in n x n output.

dtype - Data type

返回:

Identity array

eye
```
public static Array eye(int n,
                        int m,
                        int k,
                        DataType dtype)
```
Return a 2-D array with ones on the diagonal and zeros elsewhere.

参数:

n - Number of rows in the output.

m - Number of columns in the output.

k - Index of the diagonal: 0 (the default) refers to the main diagonal, a positive value refers to an upper diagonal, and a negative value to a lower diagonal.

dtype - Data type

返回:

Created array

diag
```
public static Array diag(Array a,
                         int k)
```
Extract a diagonal or construct a diagonal array.

参数:

a - If a is a 2-D array, return a copy of its k-th diagonal. If a is a 1-D array, return a 2-D array with a on the k-th diagonal.

k - Diagonal in question.

返回:

Diagonal array

magic
```
public static Array magic(int n)
```
Generate magic 2D array

参数:

n - Dimension length

返回:

Magic 2D array

toeplitz
```
public static Array toeplitz(Array col,
                             Array row)
```
Returns a Toeplitz matrix in which each descending diagonal from left to right is constant.

参数:

col - First column of the matrix. A[i, j] = kl[i - j] for i > j

row - First row of the matrix. A[i, j] = ku[j - i] for i <= j

返回:

the Toeplitz matrix.

repeat

public static Array repeat(Number v,
                           int n)

Repeat a value n times

参数:: v - The value; n - N times
返回:: Repeated array

repeat

public static Array repeat(Array a,
                           List<Integer> repeats)

Repeat elements of an array.

参数:: a - The value; repeats - The number of repetitions for each element
返回:: Repeated array

repeat

public static Array repeat(Array a,
                           List<Integer> repeats,
                           int axis)

Repeat elements of an array.

参数:: a - The value; repeats - The number of repetitions for each element; axis - The axis
返回:: Repeated array

tile

public static Array tile(Number v,
                         int n)

Repeat a value n times

参数:: v - The value; n - N times
返回:: Repeated array

tile

public static Array tile(Number v,
                         List<Integer> repeats)

Repeat a value n times

参数:: v - The value; repeats - The number of repetitions for each element
返回:: Repeated array

tile
```
public static Array tile(Array a,
                         List<Integer> repeats)
```
Repeat elements of an array.

参数:

a - The value

repeats - The number of repetitions for each element

返回:

Repeated array

rand
```
public static double rand()
```
Get random value

返回:

Random value

rand
```
public static Array rand(int n)
```
Get random array - one dimension

参数:

n - Array length

返回:

Result array

rand
```
public static Array rand(List<Integer> shape)
```
Get random array

参数:

shape - Shape

返回:

Array Result array

mergeDataType

public static DataType mergeDataType(DataType dt1,
                                     DataType dt2)

Merge data type to one data type

参数:: dt1 - Data type 1; dt2 - Data type 2
返回:: Merged data type

nonzero
```
public static List<Array> nonzero(Array a)
```
Return the indices of the elements that are non-zero.

参数:

a - Input array

返回:

Indices

flatNonZero
```
public static Array flatNonZero(Array a)
```
Return the flat indices of the elements that are non-zero.

参数:

a - Input array

返回:

Flat indices

convertToString
```
public static String convertToString(Array a)
```
Array to string

参数:

a - Array a

返回:

String

toString_old
```
public static String toString_old(Array a)
```
Array to string

参数:

a - Array a

返回:

String

dataTypeString
```
public static String dataTypeString(DataType dt)
```
Get data type string

参数:

dt - The data type

返回:

Data type string

toDataType
```
public static DataType toDataType(String dt)
```
To data type - ucar.ma2

参数:

dt - Data type string

返回:

Data type

convertToDataType

public static Array convertToDataType(Array a,
                                      DataType dataType)

Convert array to another data type

参数:: a - The input array; dataType - The data type to be converted
返回:: Converted array

toInteger
```
public static Array toInteger(Array a)
```
Convert array to integer type

参数:

a - Array a

返回:

Result array

toFloat
```
public static Array toFloat(Array a)
```
Convert array to float type

参数:

a - Array a

返回:

Result array

toDouble
```
public static Array toDouble(Array a)
```
Convert array to double type

参数:

a - Array a

返回:

Result array

toBoolean
```
public static Array toBoolean(Array a)
```
Convert array to boolean type

参数:

a - Array a

返回:

Result array

toDate
```
public static Array toDate(Array a)
```
Convert array to date type

参数:

a - Array a

返回:

Result array

convertEncoding

public static Array convertEncoding(ArrayChar a,
                                    String encoding)

Convert char array encoding from UTF-8

参数:: a - Char array; encoding - The encoding convert to
返回:: Converted array

getString

public static String getString(ArrayChar a,
                               String encoding)

Get string from a char array

参数:: a - Char array; encoding - The encoding convert to
返回:: The string

concatenate

public static Array concatenate(List<Array> arrays,
                                Integer axis)
                         throws InvalidRangeException

Concatenate arrays to one array along an axis

参数:: arrays - Array list; axis - The axis
返回:: Concatenated array
抛出:: InvalidRangeException

concatenate

public static Array concatenate(Array a,
                                Array b,
                                Integer axis)
                         throws InvalidRangeException

Concatenate two arrays to one array along an axis

参数:: a - Array a; b - Array b; axis - The axis
返回:: Concatenated array
抛出:: InvalidRangeException

arraySplit

public static List<Array> arraySplit(Array a,
                                     int sections,
                                     int axis)

Split an Array

参数:: a - Input array; sections -; axis -
返回:

unPack

public static Array unPack(Array a,
                           double missingValue,
                           double scaleFactor,
                           double addOffset)

Unpack array by missing value, scale factor and add offset

参数:: a - Input array; missingValue - Missing value; scaleFactor - Scale factor; addOffset - Add offset
返回:: Output array

sort

public static Array sort(Array a,
                         Integer axis)
                  throws InvalidRangeException

Sort array along an axis

参数:: a - Array a; axis - The axis
返回:: Sorted array
抛出:: InvalidRangeException

argSort

public static Array argSort(Array a,
                            Integer axis)
                     throws InvalidRangeException

Get sorted array index along an axis

参数:: a - Array a; axis - The axis
返回:: Index of sorted array
抛出:: InvalidRangeException

searchSorted

public static int searchSorted(Array a,
                               Number v,
                               boolean left)

Find indices where elements should be inserted to maintain order.

参数:: a - Input array; v - Value; left - Left side or right side
返回:: indices

searchSorted

public static Array searchSorted(Array a,
                                 Array v,
                                 boolean left)

Find indices where elements should be inserted to maintain order.

参数:: a - Input array; v - Value array; left - Left side or right side
返回:: indices

unique

public static Array unique(Array a,
                           Integer axis)
                    throws InvalidRangeException

Find the unique elements of an array.

参数:: a - Array a; axis - The axis
返回:: The sorted unique elements of an array
抛出:: InvalidRangeException

isUnique
```
public static boolean isUnique(Array a,
                               int limit)
```
Check array is unique by unique value number

参数:

a - The array

limit - The limit unique value number

返回:

Is unique or not

uniqueIndex

public static Array[] uniqueIndex(Array a,
                                  Integer axis)
                           throws InvalidRangeException

Find the unique elements and index of an array.

参数:: a - Array a; axis - The axis
返回:: The sorted unique elements and index of an array
抛出:: InvalidRangeException

copyToNDJavaArray

public static Object copyToNDJavaArray(Array a,
                                       String dtype)

Convert array to N-Dimension double Java array

参数:: a - Array a; dtype - Data type string
返回:: N-D Java array

copyToNDJavaArray
```
public static Object copyToNDJavaArray(Array a)
```
Convert array to N-Dimension double Java array

参数:

a - Array a

返回:

N-D Java array

copyToNDJavaArray_Long
```
public static Object copyToNDJavaArray_Long(Array a)
```
Convert array to N-Dimension double Java array

参数:

a - Array a

返回:

N-D Java array

copyToNDJavaArray_Double
```
public static Object copyToNDJavaArray_Double(Array a)
```
Convert array to N-Dimension double Java array

参数:

a - Array a

返回:

N-D Java array

copyToNDJavaArray_Double
```
public static Object copyToNDJavaArray_Double(Array a,
                                              double missingValue)
```
Convert array to N-Dimension double Java array

参数:

a - Array a

missingValue - The missing value

返回:

N-D Java array

copyTo1DJavaArray

protected static void copyTo1DJavaArray(IndexIterator iter,
                                        Object javaArray)

copyTo1DJavaArray

protected static void copyTo1DJavaArray(IndexIterator iter,
                                        Object javaArray,
                                        double missingValue)

copyTo1DJavaArray_Long

protected static void copyTo1DJavaArray_Long(IndexIterator iter,
                                             Object javaArray)

delete

public static Array delete(Array a,
                           int idx,
                           int axis)

Return a new array with sub-arrays along an axis deleted

参数:: a - Input array; idx - Index; axis - The axis
返回:

delete

public static Array delete(Array a,
                           List<Integer> idx,
                           int axis)

Return a new array with sub-arrays along an axis deleted

参数:: a - Input array; idx - Index; axis - The axis
返回:

histogram

public static List<Array> histogram(Array a,
                                    int nbins)

Histogram x/y array

参数:: a - Data array; nbins - bin number
返回:: X/Y arrays

histogram

public static List<Array> histogram(Array a,
                                    Array bins)

Histogram x/y array

参数:: a - Data array; bins - bin edges
返回:: X/Y arrays

histogram

public static List<Array> histogram(Array a,
                                    double[] bins)

Histogram x/y array

参数:: a - Data array; bins - bin edges
返回:: X/Y arrays

broadcastShapes
```
public static int[] broadcastShapes(List<List<Integer>> shapes)
```
Broadcast shape list to a new shape

参数:

shapes - The shape list

返回:

Result shape

broadcast

public static Array broadcast(Array a,
                              int[] shape)

Broadcast array to a new shape

参数:: a - Array a; shape - Shape
返回:: Result array

broadcast

public static Array broadcast(Array a,
                              List<Integer> shape)

Broadcast array to a new shape

参数:: a - Array a; shape - Shape
返回:: Result array

meshgrid

public static Array[] meshgrid(Array x,
                               Array y)

Mesh grid

参数:: x - X array - vector; y - Y array - vector
返回:: Result arrays - matrix

meshgrid
```
public static Array[] meshgrid(Array x)
```
Mesh grid

参数:

x - X array - vector

返回:

Result arrays - matrix

meshgrid
```
public static Array[] meshgrid(Array... xs)
```
Mesh grid

参数:

xs - X arrays

返回:

Result arrays - matrix

smooth5

public static Array smooth5(Array a,
                            int rowNum,
                            int colNum,
                            double unDefData)

Smooth with 5 points

参数:: a - Array; rowNum - Row number; colNum - Column number; unDefData - Missing value
返回:: Result array

smooth5
```
public static Array smooth5(Array a)
```
Smooth with 5 points

参数:

a - Array

返回:

Result array

smooth9
```
public static Array smooth9(Array a)
```
Smooth with 9 points

参数:

a - Array

返回:

Result array

interpolation_Nearest_1

public static Array interpolation_Nearest_1(List<Number> x_s,
                                            List<Number> y_s,
                                            Array a,
                                            List<Number> X,
                                            List<Number> Y,
                                            double radius,
                                            double fill_value)

Interpolate with the nearest method

参数:: x_s - scatter X array; y_s - scatter Y array; a - scatter value array; X - x coordinate; Y - y coordinate; radius - Radius; fill_value - undefine value
返回:: grid data

interpolation_Nearest_bak

public static Array interpolation_Nearest_bak(List<Number> x_s,
                                              List<Number> y_s,
                                              Array a,
                                              List<Number> X,
                                              List<Number> Y,
                                              double radius)

Interpolate with nearest method

参数:: x_s - scatter X array; y_s - scatter Y array; a - scatter value array; X - x coordinate; Y - y coordinate; radius - Radius
返回:: grid data

extendHalfCell
```
public static Array[] extendHalfCell(Array x,
                                     Array y)
```
Extend the grid to half cell, so the grid points are the centers of the cells

参数:

x - Input x coordinate

y - Input y coordinate

返回:

Result x and y coordinates

interpolation_Inside

public static Array interpolation_Inside(List<Number> x_s,
                                         List<Number> y_s,
                                         Array a,
                                         List<Number> X,
                                         List<Number> Y)

Interpolate with inside method - The grid cell value is the average value of the inside points or fill value if no inside point.

参数:: x_s - scatter X array; y_s - scatter Y array; a - scatter value array; X - x coordinate; Y - y coordinate
返回:: grid data

interpolation_Inside_Mean

public static Array interpolation_Inside_Mean(Array x_s,
                                              Array y_s,
                                              Array a,
                                              Array X,
                                              Array Y,
                                              boolean center)

Interpolate with inside method - The grid cell value is the average value of the inside points or fill value if no inside point.

参数:: x_s - scatter X array; y_s - scatter Y array; a - scatter value array; X - x coordinate; Y - y coordinate; center - If the grid point is center or border
返回:: grid data

interpolation_Inside_Max

public static Array interpolation_Inside_Max(List<Number> x_s,
                                             List<Number> y_s,
                                             Array a,
                                             List<Number> X,
                                             List<Number> Y)

Interpolate with inside method - The grid cell value is the maximum value of the inside points or fill value if no inside point.

参数:: x_s - scatter X array; y_s - scatter Y array; a - scatter value array; X - x coordinate; Y - y coordinate
返回:: grid data

interpolation_Inside_Min

public static Array interpolation_Inside_Min(List<Number> x_s,
                                             List<Number> y_s,
                                             Array a,
                                             List<Number> X,
                                             List<Number> Y)

Interpolate with inside method - The grid cell value is the minimum value of the inside points or fill value if no inside point.

参数:: x_s - scatter X array; y_s - scatter Y array; a - scatter value array; X - x coordinate; Y - y coordinate
返回:: grid data

interpolation_Inside_Count

public static Object interpolation_Inside_Count(List<Number> x_s,
                                                List<Number> y_s,
                                                List<Number> X,
                                                List<Number> Y,
                                                boolean pointDensity,
                                                boolean centerPoint)

Interpolate with inside method - The grid cell value is the count number of the inside points or fill value if no inside point.

参数:: x_s - scatter X array; y_s - scatter Y array; X - x coordinate; Y - y coordinate; pointDensity - If return point density value; centerPoint - points locate at center or border of grid
返回:: grid data

cressman

public static Array cressman(List<Number> x_s,
                             List<Number> y_s,
                             Array v_s,
                             List<Number> X,
                             List<Number> Y,
                             List<Number> radList)

Cressman analysis

参数:: x_s - scatter X array; y_s - scatter Y array; v_s - scatter value array; X - x array; Y - y array; radList - radii list
返回:: result grid data

cressman_bak

public static Array cressman_bak(List<Number> x_s,
                                 List<Number> y_s,
                                 Array v_s,
                                 List<Number> X,
                                 List<Number> Y,
                                 List<Number> radList)

Cressman analysis

参数:: x_s - scatter X array; y_s - scatter Y array; v_s - scatter value array; X - x array; Y - y array; radList - radii list
返回:: result grid data

linint2

public static Array linint2(Array a,
                            Array X,
                            Array Y,
                            Array newX,
                            Array newY)

Interpolates from a rectilinear grid to another rectilinear grid using bilinear interpolation.

参数:: a - The sample array; X - X coordinate of the sample array; Y - Y coordinate of the sample array; newX - X coordinate of the query points; newY - Y coordinate of the query points
返回:: Resampled array

slice

public static Array slice(Array a,
                          int axis,
                          int idx)
                   throws InvalidRangeException

Get slice array along an axis

参数:: a - The original array; axis - The axis; idx - The axis index
返回:: Slice array
抛出:: InvalidRangeException

slice

public static Array slice(Array a,
                          int axis,
                          Array dim,
                          double v)
                   throws InvalidRangeException

Get slice array along an axis

参数:: a - The original array; axis - The axis; dim - axis dimension array; v - axis value of slice
返回:: Slice array
抛出:: InvalidRangeException

resample_Bilinear

public static Array resample_Bilinear(Array a,
                                      List<Number> X,
                                      List<Number> Y,
                                      List<Number> newX,
                                      List<Number> newY)

Resample grid array with bilinear method

参数:: a - The sample array; X - X coordinate of the sample array; Y - Y coordinate of the sample array; newX - X coordinate of the query points; newY - Y coordinate of the query points
返回:: Resampled array

resample_Bilinear

public static Array resample_Bilinear(Array a,
                                      Array X,
                                      Array Y,
                                      Array newX,
                                      Array newY)

Resample grid array with bilinear method

参数:: a - The sample array; X - X coordinate of the sample array; Y - Y coordinate of the sample array; newX - X coordinate of the query points; newY - Y coordinate of the query points
返回:: Resampled array

resample_Neighbor

public static Array resample_Neighbor(Array a,
                                      Array X,
                                      Array Y,
                                      Array newX,
                                      Array newY)

Resample grid array with neighbor method

参数:: a - The sample array; X - X coordinate of the sample array; Y - Y coordinate of the sample array; newX - X coordinate of the query points; newY - Y coordinate of the query points
返回:: Resampled array

interpolate

public Array interpolate(Array a,
                         List<Number> X,
                         List<Number> Y)

Interpolate array data

参数:: a - Array; X - X coordinates; Y - Y coordinates
返回:: Result array data

interpn_s
```
public static double interpn_s(List<List<Number>> points,
                               Array values,
                               List<Number> xi)
```
Multidimensional interpolation on regular grids.

参数:

points - The points defining the regular grid in n dimensions.

values - The data on the regular grid in n dimensions.

xi - The coordinates to sample the gridded data at

返回:

Interpolation value

interpn_s
```
public static double interpn_s(List<Array> points,
                               Array values,
                               Array xi)
```
Multidimensional interpolation on regular grids.

参数:

points - The points defining the regular grid in n dimensions.

values - The data on the regular grid in n dimensions.

xi - The coordinates to sample the gridded data at

返回:

Interpolation value

interpn
```
public static Array interpn(List<Array> points,
                            Array values,
                            List<Array> xi)
```
Multidimensional interpolation on regular grids.

参数:

points - The points defining the regular grid in n dimensions.

values - The data on the regular grid in n dimensions.

xi - The coordinates to sample the gridded data at - 2D

返回:

Interpolation value

interpn
```
public static Object interpn(List<Array> points,
                             Array values,
                             Array xi)
                      throws InvalidRangeException
```
Multidimensional interpolation on regular grids.

参数:

points - The points defining the regular grid in n dimensions.

values - The data on the regular grid in n dimensions.

xi - The coordinates to sample the gridded data at - 2D

返回:

Interpolation value

抛出:

ucar.ma2.InvalidRangeException

InvalidRangeException

findIndices

public static Object[] findIndices(List<List<Number>> points,
                                   List<Number> xi)

Find indices

参数:: points - The points defining the regular grid in n dimensions.; xi - The coordinates to sample the gridded data at
返回:: Indices

findIndices
```
public static Object[] findIndices(List<Array> points,
                                   Array xi)
```
Find indices

参数:

points - The points defining the regular grid in n dimensions.

xi - The coordinates to sample the gridded data at

返回:

Indices

searchSorted

public static int searchSorted(List<Number> a,
                               double v)

Search sorted list index

参数:: a - Sorted list; v - value
返回:: Index

searchSorted

public static int searchSorted(Array a,
                               double v)

Search sorted list index

参数:: a - Sorted list; v - value
返回:: Index

searchSorted1

public static int[] searchSorted1(Array a,
                                  double v)

Search sorted list index

参数:: a - Sorted list; v - value
返回:: Index

interpolate_1d

public static Array interpolate_1d(double x,
                                   Array xp,
                                   Array a,
                                   int axis)
                            throws InvalidRangeException

Interpolates data with any shape over a specified axis.

参数:: x - Desired interpolated value; xp - The x-coordinates of the data points.; a - The data to be interpolated.; axis - The axis to interpolate over.
返回:: Interpolated data
抛出:: InvalidRangeException

interpolate_1d

public static Array interpolate_1d(Array xa,
                                   Array xp,
                                   Array a,
                                   int axis)
                            throws InvalidRangeException

Interpolates data with any shape over a specified axis.

参数:: xa - Desired interpolated values; xp - The x-coordinates of the data points.; a - The data to be interpolated.; axis - The axis to interpolate over.
返回:: Interpolated data
抛出:: InvalidRangeException

toStation

public static double toStation(Array data,
                               List<Number> xArray,
                               List<Number> yArray,
                               double x,
                               double y,
                               double missingValue)

Interpolate data to a station point

参数:: data - Data array; xArray - X array; yArray - Y array; x - X coordinate of the station; y - Y coordinate of the station; missingValue - Missing value
返回:: Interpolated value

toStation

public static double toStation(Array data,
                               List<Number> xArray,
                               List<Number> yArray,
                               double x,
                               double y)

Interpolate data to a station point

参数:: data - Data array; xArray - X array; yArray - Y array; x - X coordinate of the station; y - Y coordinate of the station
返回:: Interpolated value

getDimIndex

public static int getDimIndex(Array dim,
                              Number v)

Get value index in a dimension array

参数:: dim - Dimension array; v - The value
返回:: value index

gridIndex

public static int[] gridIndex(Array xdim,
                              Array ydim,
                              double x,
                              double y)

Get grid array x/y value index

参数:: xdim - X coordinate array; ydim - Y coordinate array; x - X value; y - Y value
返回:: X/Y index

gridIndex

public static int[] gridIndex(double[][] xdim,
                              double[][] ydim,
                              double x,
                              double y)

Get grid array x/y value index

参数:: xdim - X coordinate array; ydim - Y coordinate array; x - X value; y - Y value
返回:: X/Y index

toStation

public static double toStation(Array data,
                               Array xArray,
                               Array yArray,
                               double x,
                               double y)

Interpolate data to a station point

参数:: data - Data array; xArray - X array; yArray - Y array; x - X coordinate of the station; y - Y coordinate of the station
返回:: Interpolated value

toStation_Neighbor

public static double toStation_Neighbor(Array data,
                                        List<Number> xArray,
                                        List<Number> yArray,
                                        double x,
                                        double y,
                                        double missingValue)

Interpolate data to a station point

参数:: data - Data array; xArray - X array; yArray - Y array; x - X coordinate of the station; y - Y coordinate of the station; missingValue - Missing value
返回:: Interpolated value

toStation_Neighbor

public static double toStation_Neighbor(Array data,
                                        List<Number> xArray,
                                        List<Number> yArray,
                                        double x,
                                        double y)

Interpolate data to a station point

参数:: data - Data array; xArray - X array; yArray - Y array; x - X coordinate of the station; y - Y coordinate of the station
返回:: Interpolated value

toStation_Neighbor

public static double toStation_Neighbor(Array data,
                                        Array xArray,
                                        Array yArray,
                                        double x,
                                        double y)

Interpolate data to a station point

参数:: data - Data array; xArray - X array; yArray - Y array; x - X coordinate of the station; y - Y coordinate of the station
返回:: Interpolated value

类 ArrayUtil

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

ArrayUtil

方法详细资料

readASCIIFile

readASCIIFile

readASCIIFile

numASCIIRow

numASCIICol

createBinFile

writeBinFile

saveBinFile

saveASCIIFile

readBinFile

readBinFile

readBinFile

fromBuffer

fromBuffer

array

array

arrayComplex

array_list

view

arrayRange_bak

arrayRange

arrayRange1

lineSpace

lineSpace

lineSpace_bak

zeros

zeros

zeros

zeros

empty

full

full

full

ones

ones

identity

eye

diag

magic

toeplitz

repeat

repeat

repeat

tile

tile

tile

rand

rand

rand

mergeDataType

nonzero

flatNonZero

convertToString

toString_old

dataTypeString

toDataType

convertToDataType

toInteger

toFloat

toDouble

toBoolean

toDate

convertEncoding

getString

concatenate

concatenate

arraySplit

unPack

sort

argSort

searchSorted

searchSorted

unique