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  • JavierRuano · 3 ✖

issue 1

  • Concatenate DataArrays on one dim when another dim has difference sizes · 3 ✖

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  • NONE 3
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
624384220 https://github.com/pydata/xarray/issues/4016#issuecomment-624384220 https://api.github.com/repos/pydata/xarray/issues/4016 MDEyOklzc3VlQ29tbWVudDYyNDM4NDIyMA== JavierRuano 34353851 2020-05-06T00:54:38Z 2020-05-06T00:54:38Z NONE

I think another solution you could add an aleat microsecond or nanosecond field ... in the datetime index and the index should be different. You could test if there are colision in the index (it means the index<->time is not empty like the sort algorithm, something similar to https://en.wikipedia.org/wiki/Radix_sort)

It is like the reverse of this solution

https://stackoverflow.com/questions/32827169/python-reduce-precision-pandas-timestamp-dataframe/32827432

Add another coordinate could be overloaded and xarray is very powerful to extract slice of time ds.sel(time =slice('2000-06-01', '2000-06-10'))

http://xarray.pydata.org/en/stable/time-series.html#datetime-indexing

I hope it could be useful.

Regards Javier Ruano

El mié., 29 abr. 2020 17:34, Javier Ruano javier.ruanno@gmail.com escribió:

pandas doesn't have that problem import pandas as pd x1=pd.DataFrame([['1','2','3']]) x2=pd.DataFrame([['4','5','6']]) pd.concat([x1,x2],axis=1)

El mié., 29 abr. 2020 a las 17:23, Javier Ruano (javier.ruanno@gmail.com) escribió:

the time is the same. do you have tried to change the second one time index?

El mié., 29 abr. 2020 a las 16:36, Xin Zhang (notifications@github.com) escribió:

It's impossible to concatenate two arrays on same named dimensions with different sizes. MCVE Code Sample

import xarray as xrimport pandas as pd

a = xr.DataArray([0], dims=['x']) b = xr.DataArray([1, 2, 3], dims=['x']) a = a.expand_dims("time") b = b.expand_dims("time") a.coords["time"] = pd.DatetimeIndex(['2020-02-14 05:25:10']) b.coords["time"] = pd.DatetimeIndex(['2020-02-14 05:25:10']) c = xr.concat([a, b], dim='time')print(c)

Expected Output

[0, 1, 2, 3]

Problem Description

File "C:\Users\Xin\Desktop\test_github.py", line 10, in <module> c = xr.concat([a, b], dim='time') File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\concat.py", line 135, in concat return f(objs, dim, data_vars, coords, compat, positions, fill_value, join) File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\concat.py", line 455, in _dataarray_concat join=join, File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\concat.py", line 319, in _dataset_concat *datasets, join=join, copy=False, exclude=[dim], fill_value=fill_value File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\alignment.py", line 327, in align % (dim, sizes) ValueError: arguments without labels along dimension 'x' cannot be aligned because they have different dimension sizes: {1, 3}

Versions Output of xr.show_versions() INSTALLED VERSIONS

commit: None python: 3.7.6 | packaged by conda-forge | (default, Jan 7 2020, 21:48:41) [MSC v.1916 64 bit (AMD64)] python-bits: 64 OS: Windows OS-release: 10 machine: AMD64 processor: Intel64 Family 6 Model 158 Stepping 9, GenuineIntel byteorder: little LC_ALL: None LANG: None LOCALE: None.None libhdf5: 1.10.5 libnetcdf: 4.7.3

xarray: 0.15.1 pandas: 1.0.3 numpy: 1.18.1 scipy: 1.4.1 netCDF4: 1.5.3 pydap: None h5netcdf: None h5py: 2.10.0 Nio: None zarr: 2.4.0 cftime: 1.1.1.2 nc_time_axis: None PseudoNetCDF: None rasterio: 1.1.3 cfgrib: None iris: None bottleneck: None dask: 2.10.1 distributed: 2.14.0 matplotlib: 3.2.1 cartopy: 0.17.0 seaborn: 0.10.0 numbagg: None setuptools: 46.1.3.post20200325 pip: 20.0.2 conda: None pytest: None IPython: 7.13.0 sphinx: 2.4.4

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/pydata/xarray/issues/4016, or unsubscribe https://github.com/notifications/unsubscribe-auth/AIGDFO35OSYH6NU6GMCMGWTRPA3PDANCNFSM4MTY32IQ .

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  Concatenate DataArrays on one dim when another dim has difference sizes 609108666
621290319 https://github.com/pydata/xarray/issues/4016#issuecomment-621290319 https://api.github.com/repos/pydata/xarray/issues/4016 MDEyOklzc3VlQ29tbWVudDYyMTI5MDMxOQ== JavierRuano 34353851 2020-04-29T15:35:01Z 2020-04-29T15:35:01Z NONE

pandas doesn't have that problem import pandas as pd x1=pd.DataFrame([['1','2','3']]) x2=pd.DataFrame([['4','5','6']]) pd.concat([x1,x2],axis=1)

El mié., 29 abr. 2020 a las 17:23, Javier Ruano (javier.ruanno@gmail.com) escribió:

the time is the same. do you have tried to change the second one time index?

El mié., 29 abr. 2020 a las 16:36, Xin Zhang (notifications@github.com) escribió:

It's impossible to concatenate two arrays on same named dimensions with different sizes. MCVE Code Sample

import xarray as xrimport pandas as pd

a = xr.DataArray([0], dims=['x']) b = xr.DataArray([1, 2, 3], dims=['x']) a = a.expand_dims("time") b = b.expand_dims("time") a.coords["time"] = pd.DatetimeIndex(['2020-02-14 05:25:10']) b.coords["time"] = pd.DatetimeIndex(['2020-02-14 05:25:10']) c = xr.concat([a, b], dim='time')print(c)

Expected Output

[0, 1, 2, 3]

Problem Description

File "C:\Users\Xin\Desktop\test_github.py", line 10, in <module> c = xr.concat([a, b], dim='time') File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\concat.py", line 135, in concat return f(objs, dim, data_vars, coords, compat, positions, fill_value, join) File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\concat.py", line 455, in _dataarray_concat join=join, File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\concat.py", line 319, in _dataset_concat *datasets, join=join, copy=False, exclude=[dim], fill_value=fill_value File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\alignment.py", line 327, in align % (dim, sizes) ValueError: arguments without labels along dimension 'x' cannot be aligned because they have different dimension sizes: {1, 3}

Versions Output of xr.show_versions() INSTALLED VERSIONS

commit: None python: 3.7.6 | packaged by conda-forge | (default, Jan 7 2020, 21:48:41) [MSC v.1916 64 bit (AMD64)] python-bits: 64 OS: Windows OS-release: 10 machine: AMD64 processor: Intel64 Family 6 Model 158 Stepping 9, GenuineIntel byteorder: little LC_ALL: None LANG: None LOCALE: None.None libhdf5: 1.10.5 libnetcdf: 4.7.3

xarray: 0.15.1 pandas: 1.0.3 numpy: 1.18.1 scipy: 1.4.1 netCDF4: 1.5.3 pydap: None h5netcdf: None h5py: 2.10.0 Nio: None zarr: 2.4.0 cftime: 1.1.1.2 nc_time_axis: None PseudoNetCDF: None rasterio: 1.1.3 cfgrib: None iris: None bottleneck: None dask: 2.10.1 distributed: 2.14.0 matplotlib: 3.2.1 cartopy: 0.17.0 seaborn: 0.10.0 numbagg: None setuptools: 46.1.3.post20200325 pip: 20.0.2 conda: None pytest: None IPython: 7.13.0 sphinx: 2.4.4

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/pydata/xarray/issues/4016, or unsubscribe https://github.com/notifications/unsubscribe-auth/AIGDFO35OSYH6NU6GMCMGWTRPA3PDANCNFSM4MTY32IQ .

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  Concatenate DataArrays on one dim when another dim has difference sizes 609108666
621283446 https://github.com/pydata/xarray/issues/4016#issuecomment-621283446 https://api.github.com/repos/pydata/xarray/issues/4016 MDEyOklzc3VlQ29tbWVudDYyMTI4MzQ0Ng== JavierRuano 34353851 2020-04-29T15:23:59Z 2020-04-29T15:23:59Z NONE

the time is the same. do you have tried to change the second one time index?

El mié., 29 abr. 2020 a las 16:36, Xin Zhang (notifications@github.com) escribió:

It's impossible to concatenate two arrays on same named dimensions with different sizes. MCVE Code Sample

import xarray as xrimport pandas as pd

a = xr.DataArray([0], dims=['x']) b = xr.DataArray([1, 2, 3], dims=['x']) a = a.expand_dims("time") b = b.expand_dims("time") a.coords["time"] = pd.DatetimeIndex(['2020-02-14 05:25:10']) b.coords["time"] = pd.DatetimeIndex(['2020-02-14 05:25:10']) c = xr.concat([a, b], dim='time')print(c)

Expected Output

[0, 1, 2, 3]

Problem Description

File "C:\Users\Xin\Desktop\test_github.py", line 10, in <module> c = xr.concat([a, b], dim='time') File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\concat.py", line 135, in concat return f(objs, dim, data_vars, coords, compat, positions, fill_value, join) File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\concat.py", line 455, in _dataarray_concat join=join, File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\concat.py", line 319, in _dataset_concat *datasets, join=join, copy=False, exclude=[dim], fill_value=fill_value File "E:\miniconda3\envs\satpy\lib\site-packages\xarray\core\alignment.py", line 327, in align % (dim, sizes) ValueError: arguments without labels along dimension 'x' cannot be aligned because they have different dimension sizes: {1, 3}

Versions Output of xr.show_versions() INSTALLED VERSIONS

commit: None python: 3.7.6 | packaged by conda-forge | (default, Jan 7 2020, 21:48:41) [MSC v.1916 64 bit (AMD64)] python-bits: 64 OS: Windows OS-release: 10 machine: AMD64 processor: Intel64 Family 6 Model 158 Stepping 9, GenuineIntel byteorder: little LC_ALL: None LANG: None LOCALE: None.None libhdf5: 1.10.5 libnetcdf: 4.7.3

xarray: 0.15.1 pandas: 1.0.3 numpy: 1.18.1 scipy: 1.4.1 netCDF4: 1.5.3 pydap: None h5netcdf: None h5py: 2.10.0 Nio: None zarr: 2.4.0 cftime: 1.1.1.2 nc_time_axis: None PseudoNetCDF: None rasterio: 1.1.3 cfgrib: None iris: None bottleneck: None dask: 2.10.1 distributed: 2.14.0 matplotlib: 3.2.1 cartopy: 0.17.0 seaborn: 0.10.0 numbagg: None setuptools: 46.1.3.post20200325 pip: 20.0.2 conda: None pytest: None IPython: 7.13.0 sphinx: 2.4.4

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/pydata/xarray/issues/4016, or unsubscribe https://github.com/notifications/unsubscribe-auth/AIGDFO35OSYH6NU6GMCMGWTRPA3PDANCNFSM4MTY32IQ .

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  Concatenate DataArrays on one dim when another dim has difference sizes 609108666

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