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## org.apache.commons.math.linear
Interface BigMatrix

All Superinterfaces:
  AnyMatrix

All Known Implementing Classes:
  BigMatrixImpl

Deprecated. as of 2.0, replaced by `FieldMatrix` with a `BigReal` parameter

    @Deprecated
    public interface BigMatrix

extends AnyMatrix

Interface defining a real-valued matrix with basic algebraic operations, using BigDecimal representations for the entries.

Matrix element indexing is 0-based -- e.g., `getEntry(0, 0)` returns the element in the first row, first column of the matrix.

Version:
  $Revision: 811786 $ $Date: 2009-09-06 05:36:08 -0400 (Sun, 06 Sep 2009) $

Method Summary
`BigMatrix` | `add(BigMatrix m)` Deprecated. Compute the sum of this and m.
`BigMatrix` | `copy()` Deprecated. Returns a (deep) copy of this.
`java.math.BigDecimal[]` | `getColumn(int col)` Deprecated. Returns the entries in column number `col` as an array.
`double[]` | `getColumnAsDoubleArray(int col)` Deprecated. Returns the entries in column number `col` as an array of double values.
`BigMatrix` | `getColumnMatrix(int column)` Deprecated. Returns the entries in column number `column` as a column matrix.
`java.math.BigDecimal[][]` | `getData()` Deprecated. Returns matrix entries as a two-dimensional array.
`double[][]` | `getDataAsDoubleArray()` Deprecated. Returns matrix entries as a two-dimensional array.
`java.math.BigDecimal` | `getDeterminant()` Deprecated. Returns the determinant of this matrix.
`java.math.BigDecimal` | `getEntry(int row, int column)` Deprecated. Returns the entry in the specified row and column.
`double` | `getEntryAsDouble(int row, int column)` Deprecated. Returns the entry in the specified row and column as a double.
`java.math.BigDecimal` | `getNorm()` Deprecated. Returns the maximum absolute row sum norm of the matrix.
`int` | `getRoundingMode()` Deprecated. Gets the rounding mode
`java.math.BigDecimal[]` | `getRow(int row)` Deprecated. Returns the entries in row number `row` as an array.
`double[]` | `getRowAsDoubleArray(int row)` Deprecated. Returns the entries in row number `row` as an array of double values.
`BigMatrix` | `getRowMatrix(int row)` Deprecated. Returns the entries in row number `row` as a row matrix.
`BigMatrix` | `getSubMatrix(int[] selectedRows, int[] selectedColumns)` Deprecated. Gets a submatrix.
`BigMatrix` | `getSubMatrix(int startRow, int endRow, int startColumn, int endColumn)` Deprecated. Gets a submatrix.
`java.math.BigDecimal` | `getTrace()` Deprecated. Returns the trace of the matrix (the sum of the elements on the main diagonal).
`BigMatrix` | `inverse()` Deprecated. Returns the inverse of this matrix.
`BigMatrix` | `multiply(BigMatrix m)` Deprecated. Returns the result of postmultiplying this by m.
`java.math.BigDecimal[]` | `operate(java.math.BigDecimal[] v)` Deprecated. Returns the result of multiplying this by the vector `v`.
`java.math.BigDecimal[]` | `preMultiply(java.math.BigDecimal[] v)` Deprecated. Returns the (row) vector result of premultiplying this by the vector `v`.
`BigMatrix` | `preMultiply(BigMatrix m)` Deprecated. Returns the result premultiplying this by `m`.
`BigMatrix` | `scalarAdd(java.math.BigDecimal d)` Deprecated. Returns the result of adding d to each entry of this.
`BigMatrix` | `scalarMultiply(java.math.BigDecimal d)` Deprecated. Returns the result multiplying each entry of this by d.
`java.math.BigDecimal[]` | `solve(java.math.BigDecimal[] b)` Deprecated. Returns the solution vector for a linear system with coefficient matrix = this and constant vector = `b`.
`BigMatrix` | `solve(BigMatrix b)` Deprecated. Returns a matrix of (column) solution vectors for linear systems with coefficient matrix = this and constant vectors = columns of `b`.
`BigMatrix` | `subtract(BigMatrix m)` Deprecated. Compute this minus m.
`BigMatrix` | `transpose()` Deprecated. Returns the transpose of this matrix.

Methods inherited from interface org.apache.commons.math.linear.AnyMatrix
`getColumnDimension, getRowDimension, isSquare`

Method Detail

### copy

    BigMatrix copy()

  Deprecated.
  Returns a (deep) copy of this.

  Returns:
    matrix copy

### add

    BigMatrix add(BigMatrix m)
                  throws java.lang.IllegalArgumentException

  Deprecated.
  Compute the sum of this and m.

  Parameters:
    `m` - matrix to be added
  Returns:
    this + m
  Throws:
    `java.lang.IllegalArgumentException` - if m is not the same size as this

### subtract

    BigMatrix subtract(BigMatrix m)
                       throws java.lang.IllegalArgumentException

  Deprecated.
  Compute this minus m.

  Parameters:
    `m` - matrix to be subtracted
  Returns:
    this + m
  Throws:
    `java.lang.IllegalArgumentException` - if m is not the same size as this

### scalarAdd

    BigMatrix scalarAdd(java.math.BigDecimal d)

  Deprecated.
  Returns the result of adding d to each entry of this.

  Parameters:
    `d` - value to be added to each entry
  Returns:
    d + this

### scalarMultiply

    BigMatrix scalarMultiply(java.math.BigDecimal d)

  Deprecated.
  Returns the result multiplying each entry of this by d.

  Parameters:
    `d` - value to multiply all entries by
  Returns:
    d * this

### multiply

    BigMatrix multiply(BigMatrix m)
                       throws java.lang.IllegalArgumentException

  Deprecated.
  Returns the result of postmultiplying this by m.

  Parameters:
    `m` - matrix to postmultiply by
  Returns:
    this * m
  Throws:
    `java.lang.IllegalArgumentException` - if columnDimension(this) != rowDimension(m)

### preMultiply

    BigMatrix preMultiply(BigMatrix m)
                          throws java.lang.IllegalArgumentException

  Deprecated.
  Returns the result premultiplying this by `m`.

  Parameters:
    `m` - matrix to premultiply by
  Returns:
    m * this
  Throws:
    `java.lang.IllegalArgumentException` - if rowDimension(this) != columnDimension(m)

### getData

    java.math.BigDecimal[][] getData()

  Deprecated.
  Returns matrix entries as a two-dimensional array.

  Returns:
    2-dimensional array of entries

### getDataAsDoubleArray

    double[][] getDataAsDoubleArray()

  Deprecated.
  Returns matrix entries as a two-dimensional array.

  Returns:
    2-dimensional array of entries

### getRoundingMode

    int getRoundingMode()

  Deprecated.
  Gets the rounding mode

  Returns:
    the rounding mode

### getNorm

    java.math.BigDecimal getNorm()

  Deprecated.
  Returns the maximum absolute row sum norm of the matrix.

  Returns:
    norm

### getSubMatrix

    BigMatrix getSubMatrix(int startRow,
                           int endRow,
                           int startColumn,
                           int endColumn)
                           throws MatrixIndexException

  Deprecated.
  Gets a submatrix. Rows and columns are indicated counting from 0 to n-1.

  Parameters:
    `startRow` - Initial row index
    `endRow` - Final row index
    `startColumn` - Initial column index
    `endColumn` - Final column index
  Returns:
    The subMatrix containing the data of the specified rows and columns
  Throws:
    `MatrixIndexException` - if the indices are not valid

### getSubMatrix

    BigMatrix getSubMatrix(int[] selectedRows,
                           int[] selectedColumns)
                           throws MatrixIndexException

  Deprecated.
  Gets a submatrix. Rows and columns are indicated counting from 0 to n-1.

  Parameters:
    `selectedRows` - Array of row indices.
    `selectedColumns` - Array of column indices.
  Returns:
    The subMatrix containing the data in the specified rows and columns
  Throws:
    `MatrixIndexException` - if row or column selections are not valid

### getRowMatrix

    BigMatrix getRowMatrix(int row)
                           throws MatrixIndexException

  Deprecated.
  Returns the entries in row number `row` as a row matrix. Row indices start at 0.

  Parameters:
    `row` - the row to be fetched
  Returns:
    row matrix
  Throws:
    `MatrixIndexException` - if the specified row index is invalid

### getColumnMatrix

    BigMatrix getColumnMatrix(int column)
                              throws MatrixIndexException

  Deprecated.
  Returns the entries in column number `column` as a column matrix. Column indices start at 0.

  Parameters:
    `column` - the column to be fetched
  Returns:
    column matrix
  Throws:
    `MatrixIndexException` - if the specified column index is invalid

### getRow

    java.math.BigDecimal[] getRow(int row)
                                  throws MatrixIndexException

  Deprecated.
  Returns the entries in row number `row` as an array.

  Row indices start at 0. A `MatrixIndexException` is thrown unless `0 <= row < rowDimension.`

  Parameters:
    `row` - the row to be fetched
  Returns:
    array of entries in the row
  Throws:
    `MatrixIndexException` - if the specified row index is not valid

### getRowAsDoubleArray

    double[] getRowAsDoubleArray(int row)
                                 throws MatrixIndexException

  Deprecated.
  Returns the entries in row number `row` as an array of double values.

  Row indices start at 0. A `MatrixIndexException` is thrown unless `0 <= row < rowDimension.`

  Parameters:
    `row` - the row to be fetched
  Returns:
    array of entries in the row
  Throws:
    `MatrixIndexException` - if the specified row index is not valid

### getColumn

    java.math.BigDecimal[] getColumn(int col)
                                     throws MatrixIndexException

  Deprecated.
  Returns the entries in column number `col` as an array.

  Column indices start at 0. A `MatrixIndexException` is thrown unless `0 <= column < columnDimension.`

  Parameters:
    `col` - the column to be fetched
  Returns:
    array of entries in the column
  Throws:
    `MatrixIndexException` - if the specified column index is not valid

### getColumnAsDoubleArray

    double[] getColumnAsDoubleArray(int col)
                                    throws MatrixIndexException

  Deprecated.
  Returns the entries in column number `col` as an array of double values.

  Column indices start at 0. A `MatrixIndexException` is thrown unless `0 <= column < columnDimension.`

  Parameters:
    `col` - the column to be fetched
  Returns:
    array of entries in the column
  Throws:
    `MatrixIndexException` - if the specified column index is not valid

### getEntry

    java.math.BigDecimal getEntry(int row,
                                  int column)
                                  throws MatrixIndexException

  Deprecated.
  Returns the entry in the specified row and column.

  Row and column indices start at 0 and must satisfy

  - `0 <= row < rowDimension`
  - `0 <= column < columnDimension`
  otherwise a `MatrixIndexException` is thrown.

  Parameters:
    `row` - row location of entry to be fetched
    `column` - column location of entry to be fetched
  Returns:
    matrix entry in row,column
  Throws:
    `MatrixIndexException` - if the row or column index is not valid

### getEntryAsDouble

    double getEntryAsDouble(int row,
                            int column)
                            throws MatrixIndexException

  Deprecated.
  Returns the entry in the specified row and column as a double.

  Row and column indices start at 0 and must satisfy

  - `0 <= row < rowDimension`
  - `0 <= column < columnDimension`
  otherwise a `MatrixIndexException` is thrown.

  Parameters:
    `row` - row location of entry to be fetched
    `column` - column location of entry to be fetched
  Returns:
    matrix entry in row,column
  Throws:
    `MatrixIndexException` - if the row or column index is not valid

### transpose

    BigMatrix transpose()

  Deprecated.
  Returns the transpose of this matrix.

  Returns:
    transpose matrix

### inverse

    BigMatrix inverse()
                      throws InvalidMatrixException

  Deprecated.
  Returns the inverse of this matrix.

  Returns:
    inverse matrix
  Throws:
    `InvalidMatrixException` - if this is not invertible

### getDeterminant

    java.math.BigDecimal getDeterminant()
                                        throws InvalidMatrixException

  Deprecated.
  Returns the determinant of this matrix.

  Returns:
    determinant
  Throws:
    `InvalidMatrixException` - if matrix is not square

### getTrace

    java.math.BigDecimal getTrace()

  Deprecated.
  Returns the trace of the matrix (the sum of the elements on the main diagonal).

  Returns:
    trace

### operate

    java.math.BigDecimal[] operate(java.math.BigDecimal[] v)
                                   throws java.lang.IllegalArgumentException

  Deprecated.
  Returns the result of multiplying this by the vector `v`.

  Parameters:
    `v` - the vector to operate on
  Returns:
    this*v
  Throws:
    `java.lang.IllegalArgumentException` - if columnDimension != v.size()

### preMultiply

    java.math.BigDecimal[] preMultiply(java.math.BigDecimal[] v)
                                       throws java.lang.IllegalArgumentException

  Deprecated.
  Returns the (row) vector result of premultiplying this by the vector `v`.

  Parameters:
    `v` - the row vector to premultiply by
  Returns:
    v*this
  Throws:
    `java.lang.IllegalArgumentException` - if rowDimension != v.size()

### solve

    java.math.BigDecimal[] solve(java.math.BigDecimal[] b)
                                 throws java.lang.IllegalArgumentException,
                                        InvalidMatrixException

  Deprecated.
  Returns the solution vector for a linear system with coefficient matrix = this and constant vector = `b`.

  Parameters:
    `b` - constant vector
  Returns:
    vector of solution values to AX = b, where A is *this
  Throws:
    `java.lang.IllegalArgumentException` - if this.rowDimension != b.length
    `InvalidMatrixException` - if this matrix is not square or is singular

### solve

    BigMatrix solve(BigMatrix b)
                    throws java.lang.IllegalArgumentException,
                           InvalidMatrixException

  Deprecated.
  Returns a matrix of (column) solution vectors for linear systems with coefficient matrix = this and constant vectors = columns of `b`.

  Parameters:
    `b` - matrix of constant vectors forming RHS of linear systems to to solve
  Returns:
    matrix of solution vectors
  Throws:
    `java.lang.IllegalArgumentException` - if this.rowDimension != row dimension
    `InvalidMatrixException` - if this matrix is not square or is singular

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