/**
* Compute the mean square residue.
*
* @param mat Data matrix
* @return mean squared residue
*/
protected double computeMeanSquaredDeviation(final double[][] mat) {
final Mean msr = new Mean();
visitAll(
mat,
CellVisitor.SELECTED,
new CellVisitor() {
@Override
public boolean visit(double val, int row, int col, boolean selrow, boolean selcol) {
assert (selrow && selcol);
double v = val - rowM[row] - colM[col] + allM;
msr.put(v * v);
return false;
}
});
residue = msr.getMean();
return residue;
}
/**
* Computes the <b>mean column residue</b> of the given <code>col</code>.
*
* @param col The column who's residue should be computed.
* @return The row residue of the given <code>col</code>um.
*/
protected double computeColResidue(final double[][] mat, final int col) {
final double bias = colM[col] - allM;
final Mean colResidue = new Mean();
visitColumn(
mat,
col,
CellVisitor.SELECTED,
new CellVisitor() {
@Override
public boolean visit(double val, int row, int col, boolean selrow, boolean selcol) {
assert (selrow);
final double rowMean = rowM[row];
double v = val - rowMean - bias;
colResidue.put(v * v);
return false;
}
});
return colResidue.getMean();
}
/**
* Computes the <b>mean row residue</b> of the given <code>row</code>.
*
* @param mat Data matrix
* @param row The row who's residue should be computed.
* @param rowinverted Indicates if the row should be considered inverted.
* @return The row residue of the given <code>row</code>.
*/
protected double computeRowResidue(final double[][] mat, int row, final boolean rowinverted) {
final Mean rowResidue = new Mean();
visitRow(
mat,
row,
CellVisitor.SELECTED,
new CellVisitor() {
@Override
public boolean visit(double val, int row, int col, boolean selrow, boolean selcol) {
assert (selcol);
final double rowMean = rowM[row];
final double colMean = colM[col];
double v = ((!rowinverted) ? (val - rowMean) : (rowMean - val)) - colMean + allM;
rowResidue.put(v * v);
return false;
}
});
return rowResidue.getMean();
}
