/** * Check if matrices are multiplication compatible * * @param left left hand side matrix * @param right right hand side matrix * @exception IllegalArgumentException if matrices are not multiplication compatible */ public static void checkMultiplicationCompatible(final AnyMatrix left, final AnyMatrix right) throws IllegalArgumentException { if (left.getColumnDimension() != right.getRowDimension()) { throw MathRuntimeException.createIllegalArgumentException( "{0}x{1} and {2}x{3} matrices are not multiplication compatible", left.getRowDimension(), left.getColumnDimension(), right.getRowDimension(), right.getColumnDimension()); } }
/** * Check if a row index is valid. * * @param m matrix containing the submatrix * @param row row index to check * @exception MatrixIndexException if index is not valid */ public static void checkRowIndex(final AnyMatrix m, final int row) { if (row < 0 || row >= m.getRowDimension()) { throw new MatrixIndexException( "row index {0} out of allowed range [{1}, {2}]", row, 0, m.getRowDimension() - 1); } }