程序包 org.meteoinfo.common

类 MIMath

java.lang.Object

org.meteoinfo.common.MIMath

public class MIMath
extends Object

MeteoInfo Math class

作者:

Yaqiang Wang

构造器概要

构造器

构造器	说明
MIMath()

方法概要

修饰符和类型	方法	说明
static double[]	arrayMinMax(double[] values)	Get min, max of an array
static double[]	arrayMinMax(Double[] values)	Get min, max of an array
static void	arrayReverse(double[] values)	Array reverse
static void	arrayReverse(Object[] values)	Array reverse
static void	arrayReverse(PointD[] points)	Array reverse
static PointF	calEllipseCoordByAngle(double x0, double y0, double a, double b, double angle)	Calculate ellipse coordinate by angle
static double[]	cartesianToPolar(double x, double y)	Convert cartesian to polar coordinate
static boolean	doubleEquals(double a, double b)	Determine if two double data equal
static boolean	doubleEquals_Abs(double a, double b)	Determine if two double data equal
static double[]	ds2uv(double windDir, double windSpeed)	Get wind U/V components from wind direction and speed
static PointF	getCrossPoint(PointF aP1, PointF aP2, PointF bP1, PointF bP2)	Get cross point of two line segments
static int	getDecimalNum(double aData)	Get decimal number of a double data for ToString() format
static int	getDecimalNum_back(double aData)	Get decimal number of a double data for ToString() format
static double[]	getDSFromUV(double U, double V)	Get wind direction/speed from U/V
static double[]	getEndPoint(double x, double y, double angle, double len)	Get end point by start point, angle and length
static double[]	getIntervalValues(double min, double max)	Create contour values by minimum and maximum values
static List<Object>	getIntervalValues(double min, double max, boolean isExtend)	Create contour values by minimum and maximum values
static double[]	getIntervalValues(double min, double max, double interval)	Create values by interval
static double[]	getIntervalValues(double min, double max, double interval, int n)	Create values by interval
static double[]	getIntervalValues(double min, double max, double interval, int n, boolean isExtend)	Create values by interval
static double[]	getIntervalValues(double min, double max, int n)	Get interval values
static double[]	getIntervalValues(double min, double max, int n, boolean isExtend)	Get interval values
static double[]	getIntervalValues_Log(double min, double max)	Create log interval values by minimum and maximum values
static double[]	getIntervalValues_Log_bak(double min, double max)	Create log interval values by minimum and maximum values
static List<Object>	getIntervalValues1(double min, double max)	Create contour values by minimum and maximum values
static List<Object>	getIntervalValuesAxis(double min, double max)	Create contour values by minimum and maximum values
static List<Object>	getIntervalValuesAxis(double min, double max, boolean isExtend)	Create contour values by minimum and maximum values
static Extent	getLagerExtent(Extent aET, Extent bET)	Get maximum extent from two extent
static int[]	getMinMaxInt(List S)	Get mininum and maximum values
static double[]	getMinMaxValue(double[] S, double unDef)	Get mininum and maximum values
static double[]	getMinMaxValue(List S)	Get mininum and maximum values
static double[]	getMinMaxValue(List<Double> S, double unDef)	Get mininum and maximum values
static Extent	getPointFsExtent(List<PointF> PList)	Get extent from PointF list
static Extent	getPointFsExtent(PointF[] PList)	Get extent from PointF array
static Extent	getSmallerExtent(Extent aET, Extent bET)	Get Minimum extent from two extent
static double[]	getUVFromDS(double windDir, double windSpeed)	Get wind U/V from wind direction/speed
static double	getValue(double[] data, float idx)	Get value from one dimension double array by index
static Boolean	isExtentCross(Extent aET, Extent bET)	Determine if two extent cross each other
static boolean	isInclude(Rectangle aRect, Rectangle bRect)	Judge if a rectangle include another
static boolean	isNaN(Object o)	Check whether an object is NaN - only valid for double and float object
static boolean	isNullOrNaN(Object o)	Check whether an object is null or NaN - only valid for double and float object
static boolean	isNumeric(String strNumber)	Determine if a string is digital
static float	lonAdd(float lon1, float delta)	Add longitude
static float	lonDistance(float lon1, float lon2)	Longitude distance
static double	mean(List<Double> aDataList)	Mean funtion
static boolean	pointInExtent(PointD aP, Extent aET)	Determine if a point is in an Extent
static boolean	pointInExtent(PointF aP, Extent aET)	Determine if a point is in an Extent
static boolean	pointInRectangle(Point aP, Rectangle aRect)	Determine if a point is in a rectangel
static boolean	pointInRectangle(PointD aP, Rectangle aRect)	Determine if a point is in a rectangel
static boolean	pointInRectangle(PointF aP, Rectangle aRect)	Determine if a point is in a rectangel
static double[]	polarToCartesian(double B, double r)	Convert poar to cartesian coordinate
static Extent	shiftExtentLon(Extent aET, double lonShift)	Shift extent with longitude
static double[]	uv2ds(double u, double v)	Get wind direction and wind speed from U/V

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

MIMath

public MIMath()

方法详细资料

doubleEquals

public static boolean doubleEquals(double a,
                                   double b)

Determine if two double data equal

参数:

a - double a

b - double b

返回:

boolean

doubleEquals_Abs

public static boolean doubleEquals_Abs(double a,
                                       double b)

Determine if two double data equal

参数:

a - double a

b - double b

返回:

boolean

getMinMaxValue

public static double[] getMinMaxValue(double[] S,
                                      double unDef)

Get mininum and maximum values

参数:

S - Data array

unDef - Undefined data

返回:

Minimum and Maximum data array

getMinMaxValue

public static double[] getMinMaxValue(List<Double> S,
                                      double unDef)

Get mininum and maximum values

参数:

S - Data list

unDef - Undefined data

返回:

Minimum and Maximum data array

getMinMaxValue

public static double[] getMinMaxValue(List S)

Get mininum and maximum values

参数:

S - Data list

返回:

Minimum and Maximum data array

getMinMaxInt

public static int[] getMinMaxInt(List S)

Get mininum and maximum values

参数:

S - Data list

返回:

Minimum and Maximum data array

isNumeric

public static boolean isNumeric(String strNumber)

Determine if a string is digital

参数:

strNumber - the string

返回:

Boolean

isNaN

public static boolean isNaN(Object o)

Check whether an object is NaN - only valid for double and float object

参数:

o - The object

返回:

Whether is NaN

isNullOrNaN

public static boolean isNullOrNaN(Object o)

Check whether an object is null or NaN - only valid for double and float object

参数:

o - The object

返回:

Whether is null or NaN

getPointFsExtent

public static Extent getPointFsExtent(PointF[] PList)

Get extent from PointF array

参数:

PList - PointF array

返回:

The extent

getPointFsExtent

public static Extent getPointFsExtent(List<PointF> PList)

Get extent from PointF list

参数:

PList - PointF list

返回:

The extent

mean

public static double mean(List<Double> aDataList)

Mean funtion

参数:

aDataList - The data list

返回:

Mean

arrayReverse

public static void arrayReverse(PointD[] points)

Array reverse

参数:

points - PointD array

arrayReverse

public static void arrayReverse(double[] values)

Array reverse

参数:

values - Double array

arrayReverse

public static void arrayReverse(Object[] values)

Array reverse

参数:

values - Object array

arrayMinMax

public static double[] arrayMinMax(double[] values)

Get min, max of an array

参数:

values - array

返回:

Min, max

arrayMinMax

public static double[] arrayMinMax(Double[] values)

Get min, max of an array

参数:

values - array

返回:

Min, max

getCrossPoint

public static PointF getCrossPoint(PointF aP1,
                                   PointF aP2,
                                   PointF bP1,
                                   PointF bP2)

Get cross point of two line segments

参数:

aP1 - point 1 of line a

aP2 - point 2 of line a

bP1 - point 1 of line b

bP2 - point 2 of line b

返回:

cross point

shiftExtentLon

public static Extent shiftExtentLon(Extent aET,
                                    double lonShift)

Shift extent with longitude

参数:

aET - Input extent

lonShift - Longitude shift

返回:

Output extent

getLagerExtent

public static Extent getLagerExtent(Extent aET,
                                    Extent bET)

Get maximum extent from two extent

参数:

aET - Extent a

bET - Extent b

返回:

Maximum extent

getSmallerExtent

public static Extent getSmallerExtent(Extent aET,
                                      Extent bET)

Get Minimum extent from two extent

参数:

aET - Extent a

bET - Extent b

返回:

Minimum extent

isExtentCross

public static Boolean isExtentCross(Extent aET,
                                    Extent bET)

Determine if two extent cross each other

参数:

aET - Extent

bET - Extent

返回:

Boolean

pointInExtent

public static boolean pointInExtent(PointD aP,
                                    Extent aET)

Determine if a point is in an Extent

参数:

aP - The point

aET - The extent

返回:

Boolean

pointInExtent

public static boolean pointInExtent(PointF aP,
                                    Extent aET)

Determine if a point is in an Extent

参数:

aP - The point

aET - The extent

返回:

Boolean

pointInRectangle

public static boolean pointInRectangle(PointF aP,
                                       Rectangle aRect)

Determine if a point is in a rectangel

参数:

aP - The point

aRect - The rectangel

返回:

Boolean

pointInRectangle

public static boolean pointInRectangle(Point aP,
                                       Rectangle aRect)

Determine if a point is in a rectangel

参数:

aP - The point

aRect - The rectangel

返回:

Boolean

pointInRectangle

public static boolean pointInRectangle(PointD aP,
                                       Rectangle aRect)

Determine if a point is in a rectangel

参数:

aP - The point

aRect - The rectangel

返回:

Boolean

isInclude

public static boolean isInclude(Rectangle aRect,
                                Rectangle bRect)

Judge if a rectangle include another

参数:

aRect - a rectangle

bRect - b rectangle

返回:

Boolean

calEllipseCoordByAngle

public static PointF calEllipseCoordByAngle(double x0,
                                            double y0,
                                            double a,
                                            double b,
                                            double angle)

Calculate ellipse coordinate by angle

参数:

x0 - Center x

y0 - Center y

a - Major semi axis

b - Minor semi axis

angle - Angle

返回:

Coordinate

getDecimalNum

public static int getDecimalNum(double aData)

Get decimal number of a double data for ToString() format

参数:

aData - Data

返回:

Decimal number

getDecimalNum_back

public static int getDecimalNum_back(double aData)

Get decimal number of a double data for ToString() format

参数:

aData - Data

返回:

Decimal number

lonDistance

public static float lonDistance(float lon1,
                                float lon2)

Longitude distance

参数:

lon1 - Longitude 1

lon2 - Longitude 2

返回:

Longitude distance

lonAdd

public static float lonAdd(float lon1,
                           float delta)

Add longitude

参数:

lon1 - Longitude 1

delta - Delta

返回:

Longitude

getValue

public static double getValue(double[] data,
                              float idx)

Get value from one dimension double array by index

参数:

data - Data

idx - Index

返回:

Value

getIntervalValues

public static double[] getIntervalValues(double min,
                                         double max,
                                         double interval)

Create values by interval

参数:

min - Miminum value

max - Maximum value

interval - Interval value

返回:

Value array

getIntervalValues

public static double[] getIntervalValues(double min,
                                         double max,
                                         double interval,
                                         int n)

Create values by interval

参数:

min - Miminum value

max - Maximum value

interval - Interval value

n - Value number

返回:

Value array

getIntervalValues

public static double[] getIntervalValues(double min,
                                         double max,
                                         double interval,
                                         int n,
                                         boolean isExtend)

Create values by interval

参数:

min - Minimum value

max - Maximum value

interval - Interval value

n - Value number

isExtend - Extend values or not

返回:

Value array

getIntervalValues

public static double[] getIntervalValues(double min,
                                         double max,
                                         int n)

Get interval values

参数:

min - Minimum value

max - Maximum value

n - Level number

返回:

Values

getIntervalValues

public static double[] getIntervalValues(double min,
                                         double max,
                                         int n,
                                         boolean isExtend)

Get interval values

参数:

min - Minimum value

max - Maximum value

n - Level number

isExtend - Extend values or not

返回:

Values

getIntervalValues

public static double[] getIntervalValues(double min,
                                         double max)

Create contour values by minimum and maximum values

参数:

min - Minimum value

max - Maximum value

返回:

Contour values

getIntervalValues1

public static List<Object> getIntervalValues1(double min,
                                              double max)

Create contour values by minimum and maximum values

参数:

min - Minimum value

max - Maximum value

返回:

Contour values

getIntervalValuesAxis

public static List<Object> getIntervalValuesAxis(double min,
                                                 double max)

Create contour values by minimum and maximum values

参数:

min - Minimum value

max - Maximum value

返回:

Contour values

getIntervalValuesAxis

public static List<Object> getIntervalValuesAxis(double min,
                                                 double max,
                                                 boolean isExtend)

Create contour values by minimum and maximum values

参数:

min - Minimum value

max - Maximum value

isExtend - If extend values

返回:

Contour values

getIntervalValues

public static List<Object> getIntervalValues(double min,
                                             double max,
                                             boolean isExtend)

Create contour values by minimum and maximum values

参数:

min - Minimum value

max - Maximum value

isExtend - If extend values

返回:

Contour values

getIntervalValues_Log

public static double[] getIntervalValues_Log(double min,
                                             double max)

Create log interval values by minimum and maximum values

参数:

min - Minimum value

max - Maximum value

返回:

Interval values

getIntervalValues_Log_bak

public static double[] getIntervalValues_Log_bak(double min,
                                                 double max)

Create log interval values by minimum and maximum values

参数:

min - Minimum value

max - Maximum value

返回:

Interval values

cartesianToPolar

public static double[] cartesianToPolar(double x,
                                        double y)

Convert cartesian to polar coordinate

参数:

x - X

y - Y

返回:

Angle and radius

polarToCartesian

public static double[] polarToCartesian(double B,
                                        double r)

Convert poar to cartesian coordinate

参数:

r - Radius

B - Angle in radians

返回:

X and y in cartesian coordinate

getDSFromUV

public static double[] getDSFromUV(double U,
                                   double V)

Get wind direction/speed from U/V

参数:

U - The U value

V - The V value

返回:

Wind direction/speed array

getUVFromDS

public static double[] getUVFromDS(double windDir,
                                   double windSpeed)

Get wind U/V from wind direction/speed

参数:

windDir - The wind direction

windSpeed - The wind speed

返回:

Wind U/V

getEndPoint

public static double[] getEndPoint(double x,
                                   double y,
                                   double angle,
                                   double len)

Get end point by start point, angle and length

参数:

x - Start point x

y - Start point y

angle - Angle

len - Length

返回:

End point x/y values;

uv2ds

public static double[] uv2ds(double u,
                             double v)

Get wind direction and wind speed from U/V

参数:

u - U component

v - V component

返回:

Wind direction and wind speed

ds2uv

public static double[] ds2uv(double windDir,
                             double windSpeed)

Get wind U/V components from wind direction and speed

参数:

windDir - Wind direction

windSpeed - Wind speed

返回:

Wind U/V components