nudles commented on a change in pull request #493: SINGA-473 Autograd
Trigonometry: Backward Test
URL: https://github.com/apache/incubator-singa/pull/493#discussion_r308740781
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File path: test/python/test_operation.py
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@@ -65,6 +65,17 @@ def prepare_inputs_targets_for_rnn_test():
targets = [t0, t1, t2]
return inputs, targets, h0
+def numpy_unary_ops_backward(func, x, dy, h=0.0005):
Review comment:
This is not correct.
You can either use this
[one](http://cs231n.github.io/optimization-1/#gradcompute), or compute the
gradient explicitly, e.g., gradient of cos() is sin()
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