Resampling — pandas 2.2.3 documentation (original) (raw)

pandas.api.typing.Resampler instances are returned by resample calls: pandas.DataFrame.resample(), pandas.Series.resample().

Indexing, iteration#

Function application#

Resampler.apply([func]) Aggregate using one or more operations over the specified axis.
Resampler.aggregate([func]) Aggregate using one or more operations over the specified axis.
Resampler.transform(arg, *args, **kwargs) Call function producing a like-indexed Series on each group.
Resampler.pipe(func, *args, **kwargs) Apply a func with arguments to this Resampler object and return its result.

Upsampling#

Resampler.ffill([limit]) Forward fill the values.
Resampler.bfill([limit]) Backward fill the new missing values in the resampled data.
Resampler.nearest([limit]) Resample by using the nearest value.
Resampler.fillna(method[, limit]) Fill missing values introduced by upsampling.
Resampler.asfreq([fill_value]) Return the values at the new freq, essentially a reindex.
Resampler.interpolate([method, axis, limit, ...]) Interpolate values between target timestamps according to different methods.

Computations / descriptive stats#

Resampler.count() Compute count of group, excluding missing values.
Resampler.nunique(*args, **kwargs) Return number of unique elements in the group.
Resampler.first([numeric_only, min_count, ...]) Compute the first entry of each column within each group.
Resampler.last([numeric_only, min_count, skipna]) Compute the last entry of each column within each group.
Resampler.max([numeric_only, min_count]) Compute max value of group.
Resampler.mean([numeric_only]) Compute mean of groups, excluding missing values.
Resampler.median([numeric_only]) Compute median of groups, excluding missing values.
Resampler.min([numeric_only, min_count]) Compute min value of group.
Resampler.ohlc(*args, **kwargs) Compute open, high, low and close values of a group, excluding missing values.
Resampler.prod([numeric_only, min_count]) Compute prod of group values.
Resampler.size() Compute group sizes.
Resampler.sem([ddof, numeric_only]) Compute standard error of the mean of groups, excluding missing values.
Resampler.std([ddof, numeric_only]) Compute standard deviation of groups, excluding missing values.
Resampler.sum([numeric_only, min_count]) Compute sum of group values.
Resampler.var([ddof, numeric_only]) Compute variance of groups, excluding missing values.
Resampler.quantile([q]) Return value at the given quantile.