BidiagonalDecomposition (ejml-core 0.39 API)

All Superinterfaces:

DecompositionInterface<T>

All Known Subinterfaces:

BidiagonalDecomposition_F32<T>, BidiagonalDecomposition_F64<T>
```
public interface BidiagonalDecomposition<T extends Matrix>
extends DecompositionInterface<T>
```
Computes a matrix decomposition such that:

A = U*B*V^T

where A is m by n, U is orthogonal and m by m, B is an m by n bidiagonal matrix, V is orthogonal and n by n. This is used as a first step in computing the SVD of a matrix for the QR algorithm approach.

A bidiagonal matrix has zeros in every element except for the two diagonals.

b_ij = 0 if i > j or i < j-1

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`T`	`getB(T B, boolean compact)`	Returns the bidiagonal matrix.
`T`	`getU(T U, boolean transpose, boolean compact)`	Returns the orthogonal U matrix.
`T`	`getV(T V, boolean transpose, boolean compact)`	Returns the orthogonal V matrix.

Methods inherited from interface org.ejml.interfaces.decomposition.DecompositionInterface
decompose, inputModified

- Method Detail
  - getB
```
T getB(T B,
       boolean compact)
```
    Returns the bidiagonal matrix.
    
    Parameters:
    
    B - If not null the results are stored here, if null a new matrix is created.
    
    Returns:
    
    The bidiagonal matrix.
  - getU
```
T getU(T U,
       boolean transpose,
       boolean compact)
```
    Returns the orthogonal U matrix.
    
    Parameters:
    
    U - If not null then the results will be stored here. Otherwise a new matrix will be created.
    
    Returns:
    
    The extracted Q matrix.
  - getV
```
T getV(T V,
       boolean transpose,
       boolean compact)
```
    Returns the orthogonal V matrix.
    
    Parameters:
    
    V - If not null then the results will be stored here. Otherwise a new matrix will be created.
    
    Returns:
    
    The extracted Q matrix.