issue_comments: 879361320

This data as json

html_url issue_url id node_id user created_at updated_at author_association body reactions performed_via_github_app issue
https://github.com/pydata/xarray/issues/5597#issuecomment-879361320 https://api.github.com/repos/pydata/xarray/issues/5597 879361320 MDEyOklzc3VlQ29tbWVudDg3OTM2MTMyMA== 1217238 2021-07-13T19:58:39Z 2021-07-13T19:58:39Z MEMBER

This may just be the expected floating point error from using float32: ``` In [5]: import numpy as np

In [6]: -32766 * np.float32(625.6492454183389) + np.float32(20500023.17537729) Out[6]: 1.2984619140625 ```

If you use full float64, then the data does decode to 0.0: In [7]: -32766 * np.float64(625.6492454183389) + np.float64(20500023.17537729) Out[7]: 0.0

So the question then is why this ends up being decoded using float32 instead of float64, and if that logic should be adjusted or made customizable: https://github.com/pydata/xarray/blob/eea76733770be03e78a0834803291659136bca31/xarray/coding/variables.py#L225

 
{
    "total_count": 0,
    "+1": 0,
    "-1": 0,
    "laugh": 0,
    "hooray": 0,
    "confused": 0,
    "heart": 0,
    "rocket": 0,
    "eyes": 0
}
   942738904