Easy iteration over slices of a DataArray

[andreas-h]

The DataArray object would benefit from functionality similar to iris.cube.Cube.slices. Given an array

 [23]: data.coords 
Out[23]: 
Coordinates:
  * sza      (sza) float64 0.0 36.87 53.13 60.0 72.54 75.52 81.37 87.13 88.28
  * vza      (vza) float64 0.0 72.54
  * raa      (raa) float64 0.0 60.0 90.0 120.0 180.0
  * wl       (wl) float64 360.0 380.0 400.0 420.0 440.0

it would be nice to be able to do

for sl in data.slices(["raa", "wl"]):
    # do magic with a DataArray of coordinates (sza, vza)

[shoyer]

Right now we have the 1d version of slices with groupby, e.g.,

for _, sl in data.groupby('raa'):
    # work with DataArray with coordinates (wl, sza, vza)

(though the code does sort of implicitly assume that the values along the index are unique)

I agree, something like this would be nice. I think Iris now also has slices_over, e.g., data.slices_over(['sza', 'vza']) would be equivalent to your example, and it would be good to cover that case as well.

[max-sixty]

Closing as stale, please reopen if still relevant