如何对xarray数据集/数据数组的索引进行排序？

Question

I am creating a DataArray from multiple slices along the time dimension and stumbled across the 'index must be monotonic for resampling' error when trying to resample which I guess says that my time index is not sorted. I did not pay attention to the order in when I concat() inated them.

# TODO: sort instead of raising an error

is to be found in the code where the error is raised.

My question: How would I sort the indices of my DataArray s within a DataSet ? I could not find anything like sort_index() .

Answer 1

You could reindex on the sorted index - .reindex(time=sorted(dataset.time))

Not as elegant as sort_index() but it should work

EDIT: @scottclowe points out that xarray since added .sortby() , so use that! http://xarray.pydata.org/en/stable/generated/xarray.DataArray.sortby.html

Answer 2

现在有可以使用的sortby（）方法。

da = da.sortby('time')

Answer 3

I had to add .values to get sorted to work correctly. Where my time.values is a datetime64[ns]. Xarray v0.10.0.

.reindex(time=sorted(dataset.time.values))