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id node_id number title user state locked assignee milestone comments created_at updated_at ▲ closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
399309171 MDU6SXNzdWUzOTkzMDkxNzE= 2676 Reshape function works only for numpy array and raise error with xarray variable. ahmedshaaban1 15742456 closed 0     11 2019-01-15T11:46:56Z 2021-06-09T15:10:03Z 2021-06-09T15:10:03Z NONE      

Code Sample. raw is xarray.Variable (time: 12784, lat: 73, lon: 144). I am trying to reshape it.

```python

tmp= np.reshape(raw,(np.shape(raw)[0],np.shape(raw)[1]*np.shape(raw)[2])); Traceback (most recent call last):

File "<ipython-input-29-745611cba19c>", line 1, in <module> tmp= np.reshape(raw,(np.shape(raw)[0],np.shape(raw)[1]*np.shape(raw)[2]));

File "/Users/ahmedlasheen/anaconda2/lib/python2.7/site-packages/numpy/core/fromnumeric.py", line 257, in reshape return _wrapfunc(a, 'reshape', newshape, order=order)

File "/Users/ahmedlasheen/anaconda2/lib/python2.7/site-packages/numpy/core/fromnumeric.py", line 62, in _wrapfunc return _wrapit(obj, method, args, *kwds)

File "/Users/ahmedlasheen/anaconda2/lib/python2.7/site-packages/numpy/core/fromnumeric.py", line 46, in _wrapit result = wrap(result)

File "/Users/ahmedlasheen/anaconda2/lib/python2.7/site-packages/xarray/core/variable.py", line 1639, in array_wrap return Variable(self.dims, obj)

File "/Users/ahmedlasheen/anaconda2/lib/python2.7/site-packages/xarray/core/variable.py", line 259, in init self._dims = self._parse_dimensions(dims)

File "/Users/ahmedlasheen/anaconda2/lib/python2.7/site-packages/xarray/core/variable.py", line 420, in _parse_dimensions % (dims, self.ndim))

ValueError: dimensions (u'time', u'lat', u'lon') must have the same length as the number of data dimensions, ndim=2

```

Problem description

I got the previous error, which disappears once I use np.numpy(raw) instead of raw.

Expected Output

Output of xr.show_versions()

INSTALLED VERSIONS ------------------ commit: None python: 2.7.14.final.0 python-bits: 64 OS: Darwin OS-release: 18.2.0 machine: x86_64 processor: i386 byteorder: little LC_ALL: en_US.UTF-8 LANG: en_US.UTF-8 LOCALE: en_US.UTF-8 xarray: 0.10.9 pandas: 0.23.4 numpy: 1.14.2 scipy: 1.0.0 netCDF4: 1.3.1 h5netcdf: None h5py: 2.7.1 Nio: None zarr: None cftime: None PseudonetCDF: None rasterio: None iris: None bottleneck: 1.2.1 cyordereddict: None dask: 0.16.1 distributed: 1.20.2 matplotlib: 2.1.2 cartopy: 0.16.0 seaborn: 0.8.1 setuptools: 38.4.0 pip: 9.0.1 conda: 4.4.10 pytest: 3.3.2 IPython: 5.4.1 sphinx: 1.6.6 
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   completed xarray 13221727 issue
405487803 MDU6SXNzdWU0MDU0ODc4MDM= 2733 Unable to construct indexVariable. ahmedshaaban1 15742456 closed 0     3 2019-01-31T23:34:26Z 2019-02-04T07:13:04Z 2019-02-04T07:13:04Z NONE      

Hi, I am trying to reproduce the index-variable with the same data, dims, attributes, yet I got the following error message

```python-traceback Traceback (most recent call last):

File "<ipython-input-180-c993b3a40ff6>", line 4, in <module> latPP=xr.IndexVariable(latP.data,latP.dims,latP.attrs)

File "/linuxapps/anaconda/lib/python2.7/site-packages/xarray/core/variable.py", line 1618, in init fastpath)

File "/linuxapps/anaconda/lib/python2.7/site-packages/xarray/core/variable.py", line 263, in init self._dims = self._parse_dimensions(dims)

File "/linuxapps/anaconda/lib/python2.7/site-packages/xarray/core/variable.py", line 424, in _parse_dimensions % (dims, self.ndim))

ValueError: dimensions (90.0, 87.5, 85.0, 82.5, 80.0, 77.5, 75.0, 72.5, 70.0, 67.5, 65.0, 62.5, 60.0, 57.5, 55.0, 52.5, 50.0, 47.5, 45.0, 42.5, 40.0, 37.5, 35.0, 32.5, 30.0, 27.5, 25.0, 22.5, 20.0, 17.5, 15.0, 12.5, 10.0, 7.5, 5.0, 2.5, 0.0, -2.5, -5.0, -7.5, -10.0, -12.5, -15.0, -17.5, -20.0, -22.5, -25.0, -27.5, -30.0, -32.5, -35.0, -37.5, -40.0, -42.5, -45.0, -47.5, -50.0, -52.5, -55.0, -57.5, -60.0, -62.5, -65.0, -67.5, -70.0, -72.5, -75.0, -77.5, -80.0, -82.5, -85.0, -87.5, -90.0) must have the same length as the number of data dimensions, ndim=0 ```

The file is on Box drive. https://app.box.com/s/vc8m9c9blue3svbm9v7fy0xg1rkthut0 tmp_file = xr.open_dataset('olr.day.mean.nc') latP = tmp_file.variables['lat'] latPP=xr.IndexVariable(latP.data,latP.dims,latP.attrs)

Output of xr.show_versions()

xarray: 0.10.7 pandas: 0.23.1 numpy: 1.14.5 scipy: 1.1.0 netCDF4: 1.4.0 
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   completed xarray 13221727 issue

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