Expand dimensions xarray

Question

Is there an existing method or approach to expand the dimensions (and coordinates) of an xarray.DataArray object?

I would like to obtain something simil

Answer 1

I agree that some sort of method for doing this would be useful. It does not currently exist directly in xarray, but I would encourage you to file an issue on GitHub to discuss API for a new feature and/or make a pull request implementing it.

The new xarray.broadcast function contains some related functionality that may suffice for this purposes:

import xarray as xr
import numpy as np
data = xr.DataArray([1, 2, 3], dims='x')
other = xr.DataArray(np.zeros(4), coords=[('y', list('abcd'))])
data2, other2 = xr.broadcast(data, other)
print(data2)
# 
# array([[1, 1, 1, 1],
#       [2, 2, 2, 2],
#       [3, 3, 3, 3]])
# Coordinates:
#   * x        (x) int64 0 1 2
#   * y        (y) |S1 'a' 'b' 'c' 'd'