[GitHub] marfago opened a new issue #9117: argsort produces an ndarray which cannot be used for indexing an ndarray

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marfago opened a new issue #9117: argsort produces an ndarray which cannot be used for indexing an ndarray
URL: https://github.com/apache/incubator-mxnet/issues/9117
 
 
   The following snippet 
   ``` X[nd.argsort(X,axis=1)] = 0 ```
   
   gives
   
   ```
   ValueError: NDArray does not support slicing with key 
   [[  1.   2.   4. ...,  45.  14.  22.]
    [  0.   1.   2. ...,  46.   5.  22.]
    [  0.   1.   7. ...,   5.   4.  46.]
    ..., 
    [  1.   4.   7. ...,  26.   9.   6.]
    [  0.   1.   2. ...,  36.  45.  22.]
    [  0.   1.   5. ...,  20.  13.  14.]]
   <NDArray 64x50 @cpu(0)> of type <class 'mxnet.ndarray.ndarray.NDArray'>.
   ```
   
   I think that argsort result should be ready to be used as index for matrices with no further conversion.
   Please also note that argsort returns a NDAarray of double and not of int as one would expect for indexes.
   

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