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
383534360,MDU6SXNzdWUzODM1MzQzNjA=,2562,it seems that 'where' function has some problem,25431694,closed,0,,,2,2018-11-22T13:23:55Z,2018-11-22T16:33:51Z,2018-11-22T16:33:51Z,NONE,,,,"When I tried to use where condition to replace some values of array,
I found something strange. 
For example:
```
da = xr.DataArray(np.arange(24).reshape(2,3,4))
```
which produces an array ,
```
da
Out[105]: 
<xarray.DataArray (dim_0: 2, dim_1: 3, dim_2: 4)>
array([[[ 0,  1,  2,  3],
        [ 4,  5,  6,  7],
        [ 8,  9, 10, 11]],
       [[12, 13, 14, 15],
        [16, 17, 18, 19],
        [20, 21, 22, 23]]])
Dimensions without coordinates: dim_0, dim_1, dim_2
```
If I want to replace the value of larger than 2 with 100,
```
da.where(da>2,100)
Out[106]: 
<xarray.DataArray (dim_0: 2, dim_1: 3, dim_2: 4)>
array([[[100, 100, 100,   3],
        [  4,   5,   6,   7],
        [  8,   9,  10,  11]],
       [[ 12,  13,  14,  15],
        [ 16,  17,  18,  19],
        [ 20,  21,  22,  23]]])
Dimensions without coordinates: dim_0, dim_1, dim_2
```
But it seems that the values of less than 2 was changed, and when I use another condition.
```
da.where(da<2,100)
Out[107]: 
<xarray.DataArray (dim_0: 2, dim_1: 3, dim_2: 4)>
array([[[  0,   1, 100, 100],
        [100, 100, 100, 100],
        [100, 100, 100, 100]],
       [[100, 100, 100, 100],
        [100, 100, 100, 100],
        [100, 100, 100, 100]]])
Dimensions without coordinates: dim_0, dim_1, dim_2
```
```
xr.__version__
Out[108]: '0.11.0'

```
I don't know whether I used the function in wrong way.



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