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
1268821199,I_kwDOAMm_X85LoKzP,6691,Rolling.argmin() and Rolling.argmax() over multiple dimensions does not work,90059220,open,0,,,2,2022-06-13T02:42:14Z,2022-06-17T02:54:27Z,,NONE,,,,"### What is your issue?

I am working with `xarray.core.rolling.DataArrayRolling` objects and for some obscure reason, they raise the following error when the `.argmin()` and `.argmax()` methods are used:
```
window_size = {name: n for name in ['lat', 'lon']}
window = data_nc.rolling(window_size, center=True)
peak_min = window.argmin()
peak_max = window.argmax()

Traceback (most recent call last):
  Input In [48] in <cell line: 3>
  File ~\Installed_Programs\Anaconda3\envs\phd\lib\site-packages\xarray\core\rolling.py:122 in method
    return self._numpy_or_bottleneck_reduce(

  File ~\Installed_Programs\Anaconda3\envs\phd\lib\site-packages\xarray\core\rolling.py:541 in _numpy_or_bottleneck_reduce
    return self.reduce(array_agg_func, keep_attrs=keep_attrs, **kwargs)

  File ~\Installed_Programs\Anaconda3\envs\phd\lib\site-packages\xarray\core\rolling.py:428 in reduce
    result = windows.reduce(

  File ~\Installed_Programs\Anaconda3\envs\phd\lib\site-packages\xarray\core\dataarray.py:2696 in reduce
    var = self.variable.reduce(func, dim, axis, keep_attrs, keepdims, **kwargs)

  File ~\Installed_Programs\Anaconda3\envs\phd\lib\site-packages\xarray\core\variable.py:1804 in reduce
    data = func(self.data, axis=axis, **kwargs)

  File ~\Installed_Programs\Anaconda3\envs\phd\lib\site-packages\xarray\core\duck_array_ops.py:335 in f
    return func(values, axis=axis, **kwargs)

  File <__array_function__ internals>:180 in argmax

  File ~\Installed_Programs\Anaconda3\envs\phd\lib\site-packages\numpy\core\fromnumeric.py:1216 in argmax
    return _wrapfunc(a, 'argmax', axis=axis, out=out, **kwds)

  File ~\Installed_Programs\Anaconda3\envs\phd\lib\site-packages\numpy\core\fromnumeric.py:66 in _wrapfunc
    return _wrapit(obj, method, *args, **kwds)

  File ~\Installed_Programs\Anaconda3\envs\phd\lib\site-packages\numpy\core\fromnumeric.py:43 in _wrapit
    result = getattr(asarray(obj), method)(*args, **kwds)

TypeError: 'tuple' object cannot be interpreted as an integer

`````` 
As far as I understand, these methods are included based on the `xarray` documentation, so it should work as `.min()`, `.max()` or `.mean()` are working fine:
[https://docs.xarray.dev/en/stable/generated/xarray.core.rolling.DataArrayRolling.argmax.html](url)

Any insight on what I am doing wrong ?","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/6691/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,issue