/// <summary>総和</summary>
public static VariableNode Sum(VariableNode x, int[] axes = null, bool keepdims = false)
{
if (axes == null)
{
axes = (new int[x.Shape.Ndim]).Select((_, dim) => dim).ToArray();
}
foreach (int axis in axes.OrderBy((val) => val))
{
if (x.Shape[axis] == 1)
{
continue;
}
Function function = new Functions.Aggregation.Sum(axis);
x = Apply(function, x)[0];
}
if (!keepdims)
{
List <int> lengths = ((int[])x.Shape).ToList();
foreach (int axis in axes.OrderByDescending((val) => val))
{
lengths.RemoveAt(axis);
}
x = Reshape(x, new Shape(x.Shape.Type, lengths.ToArray()));
}
return(x);
}
/// <summary>総和</summary>
public static Tensor Sum(Tensor x, int[] axes = null, bool keepdims = false)
{
if (axes == null)
{
axes = (new int[x.Shape.Ndim]).Select((_, dim) => dim).ToArray();
}
foreach (int axis in axes.OrderBy((val) => val))
{
if (x.Shape[axis] == 1)
{
continue;
}
Function function = new Functions.Aggregation.Sum(axis);
Tensor y = new Tensor(function.OutputShapes(x.Shape)[0]);
function.Execute(new Tensor[] { x }, new Tensor[] { y });
x = y;
}
if (!keepdims)
{
List <int> lengths = ((int[])x.Shape).ToList();
foreach (int axis in axes.OrderByDescending((val) => val))
{
lengths.RemoveAt(axis);
}
x = Reshape(x, new Shape(x.Shape.Type, lengths.ToArray()));
}
return(x);
}