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use first element of residual in _nonpolyfit_1d #8647

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Merged
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Jan 23, 2024
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use first element of residual in _nonpolyfit_1d #8647

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2 changes: 1 addition & 1 deletion xarray/core/nputils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -234,7 +234,7 @@ def _nanpolyfit_1d(arr, x, rcond=None):
mask = np.isnan(arr)
if not np.all(mask):
out[:-1], resid, rank, _ = np.linalg.lstsq(x[~mask, :], arr[~mask], rcond=rcond)
out[-1] = resid if resid.size > 0 else np.nan
out[-1] = resid[0] if resid.size > 0 else np.nan
warn_on_deficient_rank(rank, x.shape[1])
return out

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