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Sign uplack of functionality in "unravel" function #1792
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also there's nothing about unravel in the docs |
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there is a closed issue about unravel docs, but still no docs for it #1309 |
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As far as I can see there is an xt::xtensor<size_t,2> a = xt::zeros<size_t>({5, 2});
xt::xtensor<size_t,1> i = {0, 1, 2, 3};
xt::xtensor<size_t,2> idx = xt::from_indices(xt::unravel_indices(i, a.shape()));
std::cout << idx << std::endl;But I do agree that we need to work on consistency with NumPy here. Also I feel that the overloads are not super flexible. |
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In numpy we have this:
>>>np.unravel_index(0, [1,32,32,1])(0, 0, 0, 0)>>>np.unravel_index([0,1,2], [1,32,32,1])(array([0, 0, 0]), array([0, 0, 0]), array([0, 1, 2]), array([0, 0, 0]))But in xtensor we can only use unravel with one index. Also we'll get by this not an xarray of
dimensions, but this:
Why is it so?