joddiy commented on issue #597: added tensor index selector URL: https://github.com/apache/singa/pull/597#issuecomment-587963518 Hi, @dcslin, for the backward of CNN, I guess I should firstly pad the dy as its shape same with the shape before index selection. So, I need a function that can add one column and row at the end or start of the matrix. For example, for "SAME_UPPER" mode, and output shape of [3,3,32,32], I need to pad one column and one row at the end of the dy to make the shape as [3,3,32,32].
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