chrishkchris commented on issue #488: SINGA -475 add Sign operator to singa
URL: https://github.com/apache/incubator-singa/pull/488#issuecomment-519876368
there are conflicts and there are two solutions (same as what happened in
log operator):
1. merge this branch with the latest
chrishkchris commented on issue #488: SINGA -475 add Sign operator to singa
URL: https://github.com/apache/incubator-singa/pull/488#issuecomment-519866518
This is what tensorflow use:
```cpp
Status SignGrad(const Scope& scope, const Operation& op,
const std::vector&
chrishkchris commented on issue #488: SINGA -475 add Sign operator to singa
URL: https://github.com/apache/incubator-singa/pull/488#issuecomment-519856801
In my opinion:
For the function y=sign(x) , y = 1 when x > 0, y = -1 when x < 0. Therefore,
the derivative is 0 except x = 0.
