/** {@inheritDoc} */ @Override public double visit(final int row, final int column, final double value) { return getEntry(selectedRows[row], selectedColumns[column]); }
/** {@inheritDoc} */ public void multiplyEntry(int row, int column, double factor) throws OutOfRangeException { MatrixUtils.checkMatrixIndex(this, row, column); setEntry(row, column, getEntry(row, column) * factor); }
/** {@inheritDoc} */ public double[][] getData() { final double[][] data = new double[getRowDimension()][getColumnDimension()]; for (int i = 0; i < data.length; ++i) { final double[] dataI = data[i]; for (int j = 0; j < dataI.length; ++j) { dataI[j] = getEntry(i, j); } } return data; }
/** {@inheritDoc} */ public double[] getColumn(final int column) throws OutOfRangeException { MatrixUtils.checkColumnIndex(this, column); final int nRows = getRowDimension(); final double[] out = new double[nRows]; for (int i = 0; i < nRows; ++i) { out[i] = getEntry(i, column); } return out; }
/** {@inheritDoc} */ public double[] getRow(final int row) throws OutOfRangeException { MatrixUtils.checkRowIndex(this, row); final int nCols = getColumnDimension(); final double[] out = new double[nCols]; for (int i = 0; i < nCols; ++i) { out[i] = getEntry(row, i); } return out; }
/** {@inheritDoc} */ public void addToEntry(int row, int column, double increment) throws OutOfRangeException { MatrixUtils.checkMatrixIndex(this, row, column); setEntry(row, column, getEntry(row, column) + increment); }
/** {@inheritDoc} */ public double getTrace() throws NonSquareMatrixException { final int nRows = getRowDimension(); final int nCols = getColumnDimension(); if (nRows != nCols) { throw new NonSquareMatrixException(nRows, nCols); } double trace = 0; for (int i = 0; i < nRows; ++i) { trace += getEntry(i, i); } return trace; }
/** {@inheritDoc} */ public RealMatrix getSubMatrix(final int startRow, final int endRow, final int startColumn, final int endColumn) throws OutOfRangeException, NumberIsTooSmallException { MatrixUtils.checkSubMatrixIndex(this, startRow, endRow, startColumn, endColumn); final RealMatrix subMatrix = createMatrix(endRow - startRow + 1, endColumn - startColumn + 1); for (int i = startRow; i <= endRow; ++i) { for (int j = startColumn; j <= endColumn; ++j) { subMatrix.setEntry(i - startRow, j - startColumn, getEntry(i, j)); } } return subMatrix; }
/** {@inheritDoc} */ public RealMatrix getColumnMatrix(final int column) throws OutOfRangeException { MatrixUtils.checkColumnIndex(this, column); final int nRows = getRowDimension(); final RealMatrix out = createMatrix(nRows, 1); for (int i = 0; i < nRows; ++i) { out.setEntry(i, 0, getEntry(i, column)); } return out; }
/** {@inheritDoc} */ public RealMatrix getRowMatrix(final int row) throws OutOfRangeException { MatrixUtils.checkRowIndex(this, row); final int nCols = getColumnDimension(); final RealMatrix out = createMatrix(1, nCols); for (int i = 0; i < nCols; ++i) { out.setEntry(0, i, getEntry(row, i)); } return out; }
/** {@inheritDoc} */ public RealMatrix scalarAdd(final double d) { final int rowCount = getRowDimension(); final int columnCount = getColumnDimension(); final RealMatrix out = createMatrix(rowCount, columnCount); for (int row = 0; row < rowCount; ++row) { for (int col = 0; col < columnCount; ++col) { out.setEntry(row, col, getEntry(row, col) + d); } } return out; }
/** {@inheritDoc} */ public RealMatrix scalarMultiply(final double d) { final int rowCount = getRowDimension(); final int columnCount = getColumnDimension(); final RealMatrix out = createMatrix(rowCount, columnCount); for (int row = 0; row < rowCount; ++row) { for (int col = 0; col < columnCount; ++col) { out.setEntry(row, col, getEntry(row, col) * d); } } return out; }
/** {@inheritDoc} */ public double walkInRowOrder(final RealMatrixPreservingVisitor visitor) { final int rows = getRowDimension(); final int columns = getColumnDimension(); visitor.start(rows, columns, 0, rows - 1, 0, columns - 1); for (int row = 0; row < rows; ++row) { for (int column = 0; column < columns; ++column) { visitor.visit(row, column, getEntry(row, column)); } } return visitor.end(); }
/** {@inheritDoc} */ public double walkInColumnOrder(final RealMatrixPreservingVisitor visitor) { final int rows = getRowDimension(); final int columns = getColumnDimension(); visitor.start(rows, columns, 0, rows - 1, 0, columns - 1); for (int column = 0; column < columns; ++column) { for (int row = 0; row < rows; ++row) { visitor.visit(row, column, getEntry(row, column)); } } return visitor.end(); }
/** {@inheritDoc} */ public RealMatrix add(RealMatrix m) throws MatrixDimensionMismatchException { MatrixUtils.checkAdditionCompatible(this, m); final int rowCount = getRowDimension(); final int columnCount = getColumnDimension(); final RealMatrix out = createMatrix(rowCount, columnCount); for (int row = 0; row < rowCount; ++row) { for (int col = 0; col < columnCount; ++col) { out.setEntry(row, col, getEntry(row, col) + m.getEntry(row, col)); } } return out; }
/** {@inheritDoc} */ public double walkInRowOrder(final RealMatrixChangingVisitor visitor) { final int rows = getRowDimension(); final int columns = getColumnDimension(); visitor.start(rows, columns, 0, rows - 1, 0, columns - 1); for (int row = 0; row < rows; ++row) { for (int column = 0; column < columns; ++column) { final double oldValue = getEntry(row, column); final double newValue = visitor.visit(row, column, oldValue); setEntry(row, column, newValue); } } return visitor.end(); }
/** {@inheritDoc} */ public double walkInColumnOrder(final RealMatrixChangingVisitor visitor) { final int rows = getRowDimension(); final int columns = getColumnDimension(); visitor.start(rows, columns, 0, rows - 1, 0, columns - 1); for (int column = 0; column < columns; ++column) { for (int row = 0; row < rows; ++row) { final double oldValue = getEntry(row, column); final double newValue = visitor.visit(row, column, oldValue); setEntry(row, column, newValue); } } return visitor.end(); }
/** {@inheritDoc} */ public RealMatrix subtract(final RealMatrix m) throws MatrixDimensionMismatchException { MatrixUtils.checkSubtractionCompatible(this, m); final int rowCount = getRowDimension(); final int columnCount = getColumnDimension(); final RealMatrix out = createMatrix(rowCount, columnCount); for (int row = 0; row < rowCount; ++row) { for (int col = 0; col < columnCount; ++col) { out.setEntry(row, col, getEntry(row, col) - m.getEntry(row, col)); } } return out; }
/** {@inheritDoc} */ public double walkInColumnOrder(final RealMatrixPreservingVisitor visitor, final int startRow, final int endRow, final int startColumn, final int endColumn) throws OutOfRangeException, NumberIsTooSmallException { MatrixUtils.checkSubMatrixIndex(this, startRow, endRow, startColumn, endColumn); visitor.start(getRowDimension(), getColumnDimension(), startRow, endRow, startColumn, endColumn); for (int column = startColumn; column <= endColumn; ++column) { for (int row = startRow; row <= endRow; ++row) { visitor.visit(row, column, getEntry(row, column)); } } return visitor.end(); }
/** {@inheritDoc} */ public double walkInRowOrder(final RealMatrixPreservingVisitor visitor, final int startRow, final int endRow, final int startColumn, final int endColumn) throws OutOfRangeException, NumberIsTooSmallException { MatrixUtils.checkSubMatrixIndex(this, startRow, endRow, startColumn, endColumn); visitor.start(getRowDimension(), getColumnDimension(), startRow, endRow, startColumn, endColumn); for (int row = startRow; row <= endRow; ++row) { for (int column = startColumn; column <= endColumn; ++column) { visitor.visit(row, column, getEntry(row, column)); } } return visitor.end(); }