@Override
public double squaredLoss() {
DoubleMatrix squaredDiff = pow(reconstruct(input).sub(input), 2);
double loss = squaredDiff.columnSums().sum() / input.rows;
if (this.useRegularization) {
loss += 0.5 * l2 * MatrixFunctions.pow(W, 2).sum();
}
return loss;
}
