Computes the gradient of the sigmoid of x wrt its input.
tf.raw_ops.SigmoidGrad(
    y, dy, name=None
)
Specifically, grad = dy * y * (1 - y), where y = sigmoid(x), and
dy is the corresponding input gradient.
| Args | |
|---|---|
| y | A Tensor. Must be one of the following types:bfloat16,half,float32,float64,complex64,complex128. | 
| dy | A Tensor. Must have the same type asy. | 
| name | A name for the operation (optional). | 
| Returns | |
|---|---|
| A Tensor. Has the same type asy. |