/// <summary>
/// 两个Tensor相乘，结果返回为新的Tensor。
/// 目前仅支持scalar、vector、matrix的乘法
/// </summary>
/// <param name="a">Tensor1</param>
/// <param name="b">Tensor2</param>
/// <returns>包含结果的新的Tensor</returns>
public static TensorOld Multiple(TensorOld a, TensorOld b)
{
if (a.ElementCount == 1)
{
return(Multiple(b, a.GetValue()));
}
if (b.ElementCount == 1)
{
return(Multiple(a, b.GetValue()));
}
if (a.Rank == 1)
{
a = a.Reshape(1, a.ElementCount);
}
if (b.Rank == 1)
{
b = b.Reshape(b.ElementCount, 1);
}
CheckMultipleShape(a, b);
var result = new TensorOld(a.shape[0], b.shape[1]);
Multiple(a, b, result);
return(result);
}
/// <summary>
/// 把t加到当前Tensor，t和当前Tensor必须要有相同的结构
/// </summary>
/// <param name="t">要加的Tensor</param>
/// <returns>当前Tensor</returns>
public TensorOld Add(TensorOld t)
{
if (t.ElementCount == 1)
{
return(Add(t.GetValue()));
}
CheckShape(shape, t.shape);
Add(this, t, this);
return(this);
}
/// <summary>
/// 当前Tensor和t的点积，结果保存在当前Tensor，要求两个Tensor结构一致
/// </summary>
/// <param name="t">乘上的Tensor</param>
/// <returns>当前Tensor</returns>
public TensorOld MultipleElementWise(TensorOld t)
{
if (t.ElementCount == 1)
{
return(Multiple(t.GetValue()));
}
CheckShape(shape, t.shape);
MultipleElementWise(this, t, this);
return(this);
}
/// <summary>
/// 两个Tensor的点积，结果返回为新的Tensor，要求两个Tensor结构一致
/// </summary>
/// <param name="a">Tensor1</param>
/// <param name="b">Tensor2</param>
/// <returns>包含结果的新的Tensor</returns>
public static TensorOld MultipleElementWise(TensorOld a, TensorOld b)
{
if (a.ElementCount == 1)
{
return(Multiple(b, a.GetValue()));
}
if (b.ElementCount == 1)
{
return(Multiple(a, b.GetValue()));
}
var result = a.GetSameShape();
MultipleElementWise(a, b, result);
return(result);
}
/// <summary>
/// Tensor和Tensor对应元素相加，结果返回为新的Tensor，要求两个Tensor结构相同
/// </summary>
/// <param name="a">Tensor</param>
/// <param name="b">Tensor</param>
/// <returns>相加后的结果</returns>
public static TensorOld Add(TensorOld a, TensorOld b)
{
if (a.ElementCount == 1)
{
return(Add(b, a.GetValue()));
}
if (b.ElementCount == 1)
{
return(Add(a, b.GetValue()));
}
CheckShape(a, b);
var result = a.GetSameShape();
Add(a, b, result);
return(result);
}
