private Mx leftExtend(final Mx original) {
final VecBasedMx extended = new VecBasedMx(original.rows(), original.columns() + 1);
for (int i = 0; i < original.rows(); i++) {
extended.set(i, 0, bias);
}
for (int i = 0; i < original.rows(); i++) {
for (int j = 1; j < original.columns() + 1; j++) {
extended.set(i, j, original.get(i, j - 1));
}
}
return extended;
}
private Mx leftContract(final Mx original) {
final VecBasedMx contracted = new VecBasedMx(original.rows(), original.columns() - 1);
for (int i = 0; i < contracted.rows(); i++) {
for (int j = 0; j < contracted.columns(); j++) {
contracted.set(i, j, original.get(i, j + 1));
}
}
return contracted;
}