Summarizing a list of xarray dataarray-CodePudding

I have a list of multiple dataarray with same dimensions in name and size, I want to sum all of dataarrays and create a single dataarray with the same dimensions of dataarrays, what is the best way for do it?

[<xarray.DataArray (latitude: 501, longitude: 894)>
 array(..., dtype=float32)
 Coordinates:
   * longitude  (longitude) float64 49.8 49.81 49.81 49.82 ... 56.98 56.99 57.0
   * latitude   (latitude) float64 27.0 27.01 27.02 27.03 ... 31.98 31.99 32.0
     year       int64 2000,
.......
.......
 <xarray.DataArray (latitude: 501, longitude: 894)>
 array(..., dtype=float32)
 Coordinates:
   * longitude  (longitude) float64 49.8 49.81 49.81 49.82 ... 56.98 56.99 57.0
   * latitude   (latitude) float64 27.0 27.01 27.02 27.03 ... 31.98 31.99 32.0
     year       int64 2020]

CodePudding user response：

Since you can add two xarrays a and b elementwise with a simple a b and you say you have a list of xarrays all with identical dimensions (let's call it xrs), then this is how you'd add all of them:

result = xrs[0]
for xr in xrs[1:]:
    result  = xr

By the way, that's not specific to xarray at all. If you have a list of integers xs and you want to add all of them:

result = xrs[0]
for xr in xrs[1:]:
    result  = xr

And as long as the addition operators are appropriately defined, sum(xs) would work just as well. And it does for xarray:

result = sum(xrs)