CODEWITHSUNDEEP
python-xarray
yohai
yohai

Reputation: 478

Change coordinate in xarray dataset

Suppose I have a Dataset with a few coordinates and two of them, say 'x' and 'y', are the same length. Now, if I have a variable in the Dataset that has many coordinates and x is one them, how can I change that coordinate to be y in an easy way?

Upvotes: 2

Views: 1892

Answers (1)

LiamG
LiamG

Reputation: 121

Xarray's Dataset object has a built-in method to do exactly this: Dataset.swap_dims. The documentation is here: http://xarray.pydata.org/en/stable/generated/xarray.Dataset.swap_dims.html

In your case, with ds as your Dataset,

ds.swap_dims({'x': 'y'}, inplace=True)

will return your Dataset with the x and y dimensions swapped in all data variables. Or if you want to keep your original Dataset,

ds_new = ds.swap_dims({'x', 'y'})

will store the Dataset with the dimensions swapped in dataset_new while leaving the original Dataset unchanged.

Upvotes: 2

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