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  • Matrix cross product in xarray · 4 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
317472105 https://github.com/pydata/xarray/issues/1484#issuecomment-317472105 https://api.github.com/repos/pydata/xarray/issues/1484 MDEyOklzc3VlQ29tbWVudDMxNzQ3MjEwNQ== ghost 10137 2017-07-24T16:08:30Z 2017-07-24T16:08:30Z NONE

Just saw xr.DataArray.dot(). PROBLEM SOLVED.

 
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   Matrix cross product in xarray 244702576
317470340 https://github.com/pydata/xarray/issues/1484#issuecomment-317470340 https://api.github.com/repos/pydata/xarray/issues/1484 MDEyOklzc3VlQ29tbWVudDMxNzQ3MDM0MA== ghost 10137 2017-07-24T16:02:40Z 2017-07-24T16:02:40Z NONE

How do I make dot product (np.dot or pandas.dataframe.dot) between two DataArrays? X has dimensions [dim_0, dim_1, dim_2], Y has dimensions [dim0, dim3]. result should have dimensions [dim_1, dim2, dim3]. result = np.dot(X,Y) OR, result = pd.DataFrame.dot(X,Y) In both cases, error "shapes are not aligned" occurred.

 
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   Matrix cross product in xarray 244702576
317102180 https://github.com/pydata/xarray/issues/1484#issuecomment-317102180 https://api.github.com/repos/pydata/xarray/issues/1484 MDEyOklzc3VlQ29tbWVudDMxNzEwMjE4MA== shoyer 1217238 2017-07-21T20:16:24Z 2017-07-21T20:16:24Z MEMBER

.rename('new_name') on the combined array is probably the simplest.

On Fri, Jul 21, 2017 at 12:14 PM, peteron30 notifications@github.com wrote:

Thanks. the result dataarray from xr.concat keeps the same name as var1, although it is in fact a new dataarray object. How can this be fixed? The name disappear after applying an bool index using where method.

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   Matrix cross product in xarray 244702576
317039818 https://github.com/pydata/xarray/issues/1484#issuecomment-317039818 https://api.github.com/repos/pydata/xarray/issues/1484 MDEyOklzc3VlQ29tbWVudDMxNzAzOTgxOA== shoyer 1217238 2017-07-21T15:57:11Z 2017-07-21T15:57:11Z MEMBER

To combine variables in a list into a new xarray object, you need to call xarray.concat on them, e.g., xarray.concat([var1, var1-var2, var1-var3, (var1-var2)*np.cos(var4)], 'new_dim').

 
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   Matrix cross product in xarray 244702576

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