Matrix (ktucp-fec 1.1 API)

java.lang.Object
- com.hjcenry.fec.Matrix

```
public class Matrix
extends Object
```
A matrix over the 8-bit Galois field. This class is not performance-critical, so the implementations are simple and straightforward.

字段概要

字段
限定符和类型	字段和说明
`private int`	`columns` The number of columns in the matrix.
`private byte[][]`	`data` The data in the matrix, in row major form.
`private int`	`rows` The number of rows in the matrix.

构造器概要

构造器
构造器和说明

Matrix(byte[][] initData)
Initializes a matrix with the given row-major data.

Matrix(int initRows, int initColumns)
Initialize a matrix of zeros.

构造器
构造器和说明
`Matrix(byte[][] initData)` Initializes a matrix with the given row-major data.
`Matrix(int initRows, int initColumns)` Initialize a matrix of zeros.

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`Matrix`	`augment(Matrix right)` Returns the concatenation of this matrix and the matrix on the right.
`boolean`	`equals(Object other)` Returns true iff this matrix is identical to the other.
`private void`	`gaussianElimination()` Does the work of matrix inversion.
`byte`	`get(int r, int c)` Returns the value at row r, column c.
`int`	`getColumns()` Returns the number of columns in this matrix.
`byte[]`	`getRow(int row)` Returns one row of the matrix as a byte array.
`int`	`getRows()` Returns the number of rows in this matrix.
`static Matrix`	`identity(int size)` Returns an identity matrix of the given size.
`Matrix`	`invert()` Returns the inverse of this matrix.
`void`	`set(int r, int c, byte value)` Sets the value at row r, column c.
`Matrix`	`submatrix(int rmin, int cmin, int rmax, int cmax)` Returns a part of this matrix.
`void`	`swapRows(int r1, int r2)` Exchanges two rows in the matrix.
`Matrix`	`times(Matrix right)` Multiplies this matrix (the one on the left) by another matrix (the one on the right).
`String`	`toBigString()` Returns a human-readable string of the matrix contents.
`String`	`toString()` Returns a human-readable string of the matrix contents.

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

- 字段详细资料
  - rows
```
private final int rows
```
    The number of rows in the matrix.
  - columns
```
private final int columns
```
    The number of columns in the matrix.
  - data
```
private final byte[][] data
```
    The data in the matrix, in row major form. To get element (r, c): data[r][c] Because this this is computer science, and not math, the indices for both the row and column start at 0.
- 构造器详细资料
  - Matrix
```
public Matrix(int initRows,
              int initColumns)
```
    Initialize a matrix of zeros.
    
    参数:
    
    initRows - The number of rows in the matrix.
    
    initColumns - The number of columns in the matrix.
  - Matrix
```
public Matrix(byte[][] initData)
```
    Initializes a matrix with the given row-major data.
- 方法详细资料
  - identity
```
public static Matrix identity(int size)
```
    Returns an identity matrix of the given size.
  - toString
```
public String toString()
```
    Returns a human-readable string of the matrix contents. Example: [[1, 2], [3, 4]]
    
    覆盖:
    
    toString 在类中 Object
  - toBigString
```
public String toBigString()
```
    Returns a human-readable string of the matrix contents. Example: 00 01 02 03 04 05 06 07 08 09 0a 0b
  - getColumns
```
public int getColumns()
```
    Returns the number of columns in this matrix.
  - getRows
```
public int getRows()
```
    Returns the number of rows in this matrix.
  - get
```
public byte get(int r,
                int c)
```
    Returns the value at row r, column c.
  - set
```
public void set(int r,
                int c,
                byte value)
```
    Sets the value at row r, column c.
  - equals
```
public boolean equals(Object other)
```
    Returns true iff this matrix is identical to the other.
    
    覆盖:
    
    equals 在类中 Object
  - times
```
public Matrix times(Matrix right)
```
    Multiplies this matrix (the one on the left) by another matrix (the one on the right).
  - augment
```
public Matrix augment(Matrix right)
```
    Returns the concatenation of this matrix and the matrix on the right.
  - submatrix
```
public Matrix submatrix(int rmin,
                        int cmin,
                        int rmax,
                        int cmax)
```
    Returns a part of this matrix.
  - getRow
```
public byte[] getRow(int row)
```
    Returns one row of the matrix as a byte array.
  - swapRows
```
public void swapRows(int r1,
                     int r2)
```
    Exchanges two rows in the matrix.
  - invert
```
public Matrix invert()
```
    Returns the inverse of this matrix.
    
    抛出:
    
    IllegalArgumentException - when the matrix is singular and doesn't have an inverse.
  - gaussianElimination
```
private void gaussianElimination()
```
    Does the work of matrix inversion. Assumes that this is an r by 2r matrix.

类 Matrix

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

rows

columns

data

构造器详细资料

Matrix

Matrix

方法详细资料

identity

toString

toBigString

getColumns

getRows

get

set

equals

times

augment

submatrix

getRow

swapRows

invert

gaussianElimination