protected override void MultiOutputBackward(NdArray[] ys, NdArray x)
{
NdArray resultNdArray = ys[0].Clone();
for (int i = 1; i < ys.Length; i++)
{
resultNdArray = NdArray.Concatenate(resultNdArray, ys[i], Axis);
}
for (int i = 0; i < x.Grad.Length; i++)
{
x.Grad[i] += resultNdArray.Grad[i];
}
}
public static void MultiOutputBackward(NdArray <Real>[] ys, NdArray <Real> x, int axis)
{
NdArray <Real> resultNdArray = ys[0].Clone();
for (int i = 1; i < ys.Length; i++)
{
resultNdArray = NdArray.Concatenate(resultNdArray, ys[i], axis);
}
for (int i = 0; i < x.Grad.Length; i++)
{
x.Grad[i] += resultNdArray.Grad[i];
}
}
private void BackwardCpu(NdArray[] ys, NdArray x)
{
NdArray resultNdArray = ys[0].Clone();
for (int i = 1; i < ys.Length; i++)
{
resultNdArray = NdArray.Concatenate(resultNdArray, ys[i], Axis);
}
for (int i = 0; i < x.Grad.Length; i++)
{
x.Grad[i] += resultNdArray.Grad[i];
}
}
private NdArray ForwardCpu(params NdArray[] xs)
{
int[] sections = new int[xs.Length - 1];
int sizeOffset = xs[0].Shape[Axis];
NdArray resultNdArray = xs[0].Clone();
for (int i = 1; i < xs.Length; i++)
{
//BackwardのSplitで使用しないため最後のshapeを保存しないロジックになっている
sections[i - 1] = sizeOffset;
sizeOffset += xs[i].Shape[Axis];
resultNdArray = NdArray.Concatenate(resultNdArray, xs[i], Axis);
}
resultNdArray.ParentFunc = this;
_prevInputSections.Add(sections);
return(resultNdArray);
}