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DOC: update pandas.core.resample.Resampler.nearest docstring #20381
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@@ -418,23 +418,80 @@ def pad(self, limit=None): | |
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def nearest(self, limit=None): | ||
""" | ||
Fill values with nearest neighbor starting from center | ||
Resample by using the nearest value. | ||
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When resampling data, missing values may appear (e.g., when the | ||
resampling frequency is higher than the original frequency). | ||
The nearest fill will replace ``NaN`` values that appeared in | ||
the resampled data with the value from the nearest member of the | ||
sequence, based on the index value. | ||
Missing values that existed in the original data will not be modified. | ||
If `limit` is given, fill only `limit` values in each direction for | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Maybe the second " |
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each of the original values. | ||
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Parameters | ||
---------- | ||
limit : integer, optional | ||
limit of how many values to fill | ||
limit : int, optional | ||
Limit of how many values to fill. | ||
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.. versionadded:: 0.21.0 | ||
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Returns | ||
------- | ||
an upsampled Series | ||
Series or DataFrame | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. @datapythonista do we have a convention for saying same-type-as-input? |
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An upsampled Series or DataFrame with ``NaN`` values filled with | ||
their nearest value. | ||
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See Also | ||
-------- | ||
Series.fillna | ||
DataFrame.fillna | ||
backfill: Backward fill the new missing values in the resampled data. | ||
fillna : Fill ``NaN`` values using the specified method, which can be | ||
'backfill'. | ||
pad : Forward fill ``NaN`` values. | ||
pandas.Series.fillna : Fill ``NaN`` values in the Series using the | ||
specified method, which can be 'backfill'. | ||
pandas.DataFrame.fillna : Fill ``NaN`` values in the DataFrame using | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. The thoroughness is good, but this seems excessive. @datapythonista what's the convention for how much to write in this section? |
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the specified method, which can be 'backfill'. | ||
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Examples | ||
-------- | ||
>>> s = pd.Series([1, 2, 3], | ||
... index=pd.date_range('20180101', | ||
... periods=3, | ||
... freq='1h')) | ||
>>> s | ||
2018-01-01 00:00:00 1 | ||
2018-01-01 01:00:00 2 | ||
2018-01-01 02:00:00 3 | ||
Freq: H, dtype: int64 | ||
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>>> s.resample('20min').nearest() | ||
2018-01-01 00:00:00 1 | ||
2018-01-01 00:20:00 1 | ||
2018-01-01 00:40:00 2 | ||
2018-01-01 01:00:00 2 | ||
2018-01-01 01:20:00 2 | ||
2018-01-01 01:40:00 3 | ||
2018-01-01 02:00:00 3 | ||
Freq: 20T, dtype: int64 | ||
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Limit the number of upsampled values imputed by the nearest: | ||
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>>> s.resample('10min').nearest(limit=1) | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. This is a tad long. Can you change it to There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. +1 |
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2018-01-01 00:00:00 1.0 | ||
2018-01-01 00:10:00 1.0 | ||
2018-01-01 00:20:00 NaN | ||
2018-01-01 00:30:00 NaN | ||
2018-01-01 00:40:00 NaN | ||
2018-01-01 00:50:00 2.0 | ||
2018-01-01 01:00:00 2.0 | ||
2018-01-01 01:10:00 2.0 | ||
2018-01-01 01:20:00 NaN | ||
2018-01-01 01:30:00 NaN | ||
2018-01-01 01:40:00 NaN | ||
2018-01-01 01:50:00 3.0 | ||
2018-01-01 02:00:00 3.0 | ||
Freq: 10T, dtype: float64 | ||
""" | ||
return self._upsample('nearest', limit=limit) | ||
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"nearest fill" refers to this method, right? Maybe make that explicit with "
nearest
fill method"?