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Posted to issues@mxnet.apache.org by GitBox <gi...@apache.org> on 2020/09/24 15:01:30 UTC
[GitHub] [incubator-mxnet] duothink opened a new issue #19217: how to take specific data from 3 dims NDArray?
duothink opened a new issue #19217:
URL: https://github.com/apache/incubator-mxnet/issues/19217
## Description
```
from mxnet import nd
#x is 2x3x4
x = nd.array([
[
[1,2,3,4],
[5,6,7,8],
[9,10,11,12]
],
[
[13,14,15,16],
[17,18,19,20],
[21,22,23,24]
]
])
idx = nd.array([0,2])
y = x.take(idx,axis=1)
print(y)
```
out is :
[[[ 1. 2. 3. 4.]
[ 9. 10. 11. 12.]]
[[13. 14. 15. 16.]
[21. 22. 23. 24.]]]
<NDArray 2x2x4 @cpu(0)>
how can I get a NDArray 2x1x4 as below
[
[ [1,2,3,4] ],
[ [21,22,23,24] ]
]
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[GitHub] [incubator-mxnet] github-actions[bot] commented on issue #19217: how to take specific data from 3 dims NDArray?
Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on issue #19217:
URL: https://github.com/apache/incubator-mxnet/issues/19217#issuecomment-698402244
Welcome to Apache MXNet (incubating)! We are on a mission to democratize AI, and we are glad that you are contributing to it by opening this issue.
Please make sure to include all the relevant context, and one of the @apache/mxnet-committers will be here shortly.
If you are interested in contributing to our project, let us know! Also, be sure to check out our guide on [contributing to MXNet](https://mxnet.apache.org/community/contribute) and our [development guides wiki](https://cwiki.apache.org/confluence/display/MXNET/Developments).
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[GitHub] [incubator-mxnet] szha closed issue #19217: how to take specific data from 3 dims NDArray?
Posted by GitBox <gi...@apache.org>.
szha closed issue #19217:
URL: https://github.com/apache/incubator-mxnet/issues/19217
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[GitHub] [incubator-mxnet] szha commented on issue #19217: how to take specific data from 3 dims NDArray?
Posted by GitBox <gi...@apache.org>.
szha commented on issue #19217:
URL: https://github.com/apache/incubator-mxnet/issues/19217#issuecomment-698648045
Hi, I think what you need is gather_nd
```
x = nd.array([
...: [
...: [1,2,3,4],
...: [5,6,7,8],
...: [9,10,11,12]
...: ],
...: [
...: [13,14,15,16],
...: [17,18,19,20],
...: [21,22,23,24]
...: ]
...: ])
...: idx = nd.array([[0, 1], [0, 2]])
...: y = nd.gather_nd(x, idx)
...: print(y)
...:
[[ 1. 2. 3. 4.]
[21. 22. 23. 24.]]
<NDArray 2x4 @cpu(0)>
```
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[GitHub] [incubator-mxnet] szha commented on issue #19217: how to take specific data from 3 dims NDArray?
Posted by GitBox <gi...@apache.org>.
szha commented on issue #19217:
URL: https://github.com/apache/incubator-mxnet/issues/19217#issuecomment-698648045
Hi, I think what you need is gather_nd
```
x = nd.array([
...: [
...: [1,2,3,4],
...: [5,6,7,8],
...: [9,10,11,12]
...: ],
...: [
...: [13,14,15,16],
...: [17,18,19,20],
...: [21,22,23,24]
...: ]
...: ])
...: idx = nd.array([[0, 1], [0, 2]])
...: y = nd.gather_nd(x, idx)
...: print(y)
...:
[[ 1. 2. 3. 4.]
[21. 22. 23. 24.]]
<NDArray 2x4 @cpu(0)>
```
----------------------------------------------------------------
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[GitHub] [incubator-mxnet] szha closed issue #19217: how to take specific data from 3 dims NDArray?
Posted by GitBox <gi...@apache.org>.
szha closed issue #19217:
URL: https://github.com/apache/incubator-mxnet/issues/19217
----------------------------------------------------------------
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[GitHub] [incubator-mxnet] github-actions[bot] commented on issue #19217: how to take specific data from 3 dims NDArray?
Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on issue #19217:
URL: https://github.com/apache/incubator-mxnet/issues/19217#issuecomment-698402244
Welcome to Apache MXNet (incubating)! We are on a mission to democratize AI, and we are glad that you are contributing to it by opening this issue.
Please make sure to include all the relevant context, and one of the @apache/mxnet-committers will be here shortly.
If you are interested in contributing to our project, let us know! Also, be sure to check out our guide on [contributing to MXNet](https://mxnet.apache.org/community/contribute) and our [development guides wiki](https://cwiki.apache.org/confluence/display/MXNET/Developments).
----------------------------------------------------------------
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