SparseRCMFloatMatrix2D
cern.colt.matrix.tfloat.impl

Class SparseRCMFloatMatrix2D

    • Constructor Detail

      • SparseRCMFloatMatrix2D

        public SparseRCMFloatMatrix2D(int rows,                      int columns)
        Constructs a matrix with a given number of rows and columns. All entries are initially 0.
        Parameters:
        rows - the number of rows the matrix shall have.
        columns - the number of columns the matrix shall have.
        Throws:
        IllegalArgumentException - if rows<0 || columns<0 || (double)columns*rows > Integer.MAX_VALUE .
    • Method Detail

      • getQuick

        public float getQuick(int row,             int column)
        Description copied from class: FloatMatrix2D
        Returns the matrix cell value at coordinate [row,column].

        Provided with invalid parameters this method may return invalid objects without throwing any exception. You should only use this method when you are absolutely sure that the coordinate is within bounds. Precondition (unchecked): 0 <= column < columns() && 0 <= row < rows().

        Overrides:
        getQuick in class WrapperFloatMatrix2D
        Parameters:
        row - the index of the row-coordinate.
        column - the index of the column-coordinate.
        Returns:
        the value at the specified coordinate.
      • setQuick

        public void setQuick(int row,            int column,            float value)
        Description copied from class: FloatMatrix2D
        Sets the matrix cell at coordinate [row,column] to the specified value.

        Provided with invalid parameters this method may access illegal indexes without throwing any exception. You should only use this method when you are absolutely sure that the coordinate is within bounds. Precondition (unchecked): 0 <= column < columns() && 0 <= row < rows().

        Overrides:
        setQuick in class WrapperFloatMatrix2D
        Parameters:
        row - the index of the row-coordinate.
        column - the index of the column-coordinate.
        value - the value to be filled into the specified cell.
      • trimToSize

        public void trimToSize()
        Description copied from class: AbstractMatrix
        Releases any superfluous internal memory. An application can use this operation to minimize the storage of the receiver.

        This default implementation does nothing. Override this method if necessary.

        Overrides:
        trimToSize in class AbstractMatrix
      • viewRow

        public SparseFloatMatrix1D viewRow(int row)
        Description copied from class: FloatMatrix2D
        Constructs and returns a new slice view representing the columns of the given row. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa. To obtain a slice view on subranges, construct a sub-ranging view ( viewPart(...)), then apply this method to the sub-range view.

        Example:

        2 x 3 matrix:
        1, 2, 3
        4, 5, 6
        viewRow(0) ==> Matrix1D of size 3:
        1, 2, 3
        Overrides:
        viewRow in class WrapperFloatMatrix2D
        Parameters:
        row - the row to fix.
        Returns:
        a new slice view.
        See Also:
        FloatMatrix2D.viewColumn(int)
      • like

        public FloatMatrix2D like(int rows,                 int columns)
        Description copied from class: FloatMatrix2D
        Construct and returns a new empty matrix of the same dynamic type as the receiver, having the specified number of rows and columns. For example, if the receiver is an instance of type DenseFloatMatrix2D the new matrix must also be of type DenseFloatMatrix2D, if the receiver is an instance of type SparseFloatMatrix2D the new matrix must also be of type SparseFloatMatrix2D, etc. In general, the new matrix should have internal parametrization as similar as possible.
        Overrides:
        like in class WrapperFloatMatrix2D
        Parameters:
        rows - the number of rows the matrix shall have.
        columns - the number of columns the matrix shall have.
        Returns:
        a new empty matrix of the same dynamic type.

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