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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
269297904 MDU6SXNzdWUyNjkyOTc5MDQ= 1666 Could a DataArrayRolling object compute an arbitrary function on rolling windows? ziofil 8944955 closed 0     14 2017-10-28T08:53:16Z 2020-11-25T00:08:45Z 2020-11-25T00:08:45Z NONE      

What I'd like to do is something of this kind

Code Sample, a copy-pastable example if possible

```python da = xr.DataArray(range(10)) r = da.rolling(dim_0=2)

def func(x, axis, **kwargs): return x/x[-1] # for example

This is the desired functionality

generator = r.map(func) func_on_window = generator.next() # each time this is called, the rolling object returns func(window,...) ```

Desired output

```python generator.next()

[0,1]

generator.next()

[0.5,1]

generator.next()

[0.6666...,1]

... ```

This would be extremely useful to pipe data directly into a neural network for instance.

 
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   completed xarray 13221727 issue

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