pandas.core.window.expanding.Expanding.cov
- Expanding. cov ( other=None, pairwise=None, ddof=1, **kwargs ) [source]
-
Calculate the expanding sample covariance.
- Parameters
-
- other :Series or DataFrame, optional
-
If not supplied then will default to self and produce pairwise output.
- pairwise :bool, default None
-
If False then only matching columns between self and other will be used and the output will be a DataFrame. If True then all pairwise combinations will be calculated and the output will be a MultiIndexed DataFrame in the case of DataFrame inputs. In the case of missing elements, only complete pairwise observations will be used.
- ddof :int, default 1
-
Delta Degrees of Freedom. The divisor used in calculations is
N - ddof
, whereN
represents the number of elements. - **kwargs
-
For NumPy compatibility and will not have an effect on the result.
- Returns
-
- Series or DataFrame
-
Return type is the same as the original object with
np.float64
dtype.
See also
-
pandas.Series.expanding
-
Calling expanding with Series data.
-
pandas.DataFrame.expanding
-
Calling expanding with DataFrames.
-
pandas.Series.cov
-
Aggregating cov for Series.
-
pandas.DataFrame.cov
-
Aggregating cov for DataFrame.
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Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/1.4.0/reference/api/pandas.core.window.expanding.Expanding.cov.html