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You should also check out xr-scipy which wraps a lot of scipy stuff. And also xrft for Fourier transforms

Generally you'll need to use Dask functions on .data if you want it to be lazy. On Sun, Jan 20, 2019 at 9:56 PM Ahmed Shaaban notifications@github.com wrote:

Thanks ... I am wondering if I used Numpy/Scipy functions on Xarray.data, will such computation is performed under the umbrella of Dask (Lazy evaluation)?

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array_wrap is an old interface that a variety of NumPy functions use (in an apparently hard to predict ways). On Fri, Jan 18, 2019 at 10:07 PM Joe Hamman notifications@github.com wrote:

@ahmedshaaban1 https://github.com/ahmedshaaban1 - You may also want to checkout http://xarray.pydata.org/en/stable/computation.html#wrapping-custom-computation

@shoyer https://github.com/shoyer - can you expand on what you meant about removing the xarray.Variable.array_wrap method? xarray.DataArray also calls this method a few times so we'd have to think about how far to take this.

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@ahmedshaaban1 - You may also want to checkout http://xarray.pydata.org/en/stable/computation.html#wrapping-custom-computation

@shoyer - can you expand on what you meant about removing the xarray.Variable.__array_wrap__ method? xarray.DataArray also calls this method a few times so we'd have to think about how far to take this.

In general you need to apply NumPy/scipy functions on the .data attribute of an xarray object, and recreate the labels. On Thu, Jan 17, 2019 at 10:54 PM Ahmed Shaaban notifications@github.com wrote:

Thanks a lot for your answer. I am a novice to Xarray, and I am a heavy user of NumPy. Numpy FFT function works fine with Xarray variables, yet it returns NumPy array. NumPy reshape function, as mentioned above, does not work with Xarray variable. I am not yet able to understand how to use the power of Xarray and at the same time be able to use the math/statistics function of Numpy/SciPy.

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We should probably remove the xarray.Variable.__array_wrap__ method

@ahmedshaaban1 - what is the expected output you'd like to get from a reshape call. You may already know that xarray doesn't have a reshape method. Usually, stack/unstack are used to "reshape" DataArrays.