joddiy commented on a change in pull request #736:
URL: https://github.com/apache/singa/pull/736#discussion_r440637288
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File path: python/singa/autograd.py
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@@ -4698,6 +4698,103 @@ def cossim(a, b):
return CosSim()(a, b)[0]
+class Expand(Operator):
+ """
+ Init a expand operator
Review comment:
I've added an example usage at the comment.
The `expand` duplicates the data along with the axis. It looks like
`upsample` but still has some differences.
>
Example usage::
data = [[1.], [2.], [3.]]
# dim_changed
shape = [2, 1, 6]
output = [[[1., 1., 1., 1., 1., 1.],
[2., 2., 2., 2., 2., 2.],
[3., 3., 3., 3., 3., 3.]],
[[1., 1., 1., 1., 1., 1.],
[2., 2., 2., 2., 2., 2.],
[3., 3., 3., 3., 3., 3.]]]
# dim_unchanged
shape = [3, 4]
output = [[1., 1., 1., 1.],
[2., 2., 2., 2.],
[3., 3., 3., 3.]]
>
For upsample
>
Example usage::
data = [[[[1, 2],
[3, 4],]]]
# nearest
scales = [1.0, 1.0, 2.0, 3.0]
output = [[[[1, 1, 1, 2, 2, 2],
[1, 1, 1, 2, 2, 2],
[3, 3, 3, 4, 4, 4],
[3, 3, 3, 4, 4, 4],]]]
>
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