private static NdArray <Real> LocalMin(NdArray <Real> input, int axis)
{
int[] resultShape = new int[input.Shape.Length - 1];
for (int i = 0, j = 0; i < input.Shape.Length; i++)
{
if (i != axis)
{
resultShape[j++] = input.Shape[i];
}
}
NdArray <Real> result = new NdArray <Real>(resultShape, input.BatchCount);
result.Fill(input.Data.Min());
if (input.Grad != null)
{
result.FillGrad(input.Grad.Min());
}
for (int i = 0; i < input.Length; i++)
{
List <int> index = new List <int>(input.GetDimensionsIndex(i));
index.RemoveAt(axis);
int localIndex = result.GetLocalIndex(0, index.ToArray());
for (int batchCount = 0; batchCount < input.BatchCount; batchCount++)
{
if (result.Data[batchCount * result.Length + localIndex] > input.Data[batchCount * input.Length + i])
{
result.Data[batchCount * result.Length + localIndex] = input.Data[batchCount * input.Length + i];
}
if (input.Grad != null)
{
if (result.Grad[batchCount * result.Length + localIndex] > input.Grad[batchCount * input.Length + i])
{
result.Grad[batchCount * result.Length + localIndex] = input.Grad[batchCount * input.Length + i];
}
}
}
}
return(result);
}