[GitHub] [incubator-mxnet] apeforest edited a comment on issue #14992: [MXNET-978] Support higher order gradient for `log`.

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apeforest edited a comment on issue #14992: [MXNET-978] Support higher order gradient for `log`.
URL: https://github.com/apache/incubator-mxnet/pull/14992#issuecomment-495414142
 
 
   > > I do not fully understand your question of 1/log(2.0), 1/log(10.0) multiplied with gradient for log2, log 10. Could you please elaborate?
   > 
   > Reading it again, I phrased it poorly. Sorry. So actually, plan was to update `gradient` for `log2`, which would be `1/(log(2.0) * x)`, for which I would have required a `log(2.0)`. So how to get that, is scalar multiplication allowed ? or `ones_like` followed by `fill`.
   > 
   > **Note**: This is not needed for this PR. But curious to know.
   > 
   > Thank You.
   
   After reviewing your code, I had a better understanding of what you meant. I think you can do an elemwise_mul operator with Op('log') and a vector filled with 2.0. There maybe other ways to optimize the graph representation, but I think this should actually work.

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