This function is useful to massage a DataFrame into a format where one or more columns are identifier variables (id_vars) while all other columns, considered ...

This function is useful to massage a DataFrame into a format where one or more columns are identifier variables (id_vars) while all other columns, considered ...

28 июн. 2024 г. · In Polars, the melt operation transforms a DataFrame from a wide format to a long format by reshaping columns into rows. It enables the ...

This function is useful to massage a DataFrame into a format where one or more columns are identifier variables (index) while all other columns, considered ...

6 янв. 2024 г. · Checks I have checked that this issue has not already been reported. I have confirmed this bug exists on the latest version of Polars.

15 мар. 2024 г. · It seems I need to add an index in order to pivot df_long back into the original form of df ? Is there no way to pivot a polars dataframe ...

Melt is the inverse of pivot. While pivot takes us from long data to wide data, melt goes from wide to long. Note: Polars has recently replaced its melt method ...

Aggregate the columns of this DataFrame to their median value. melt. Unpivot a DataFrame from wide to long format. merge_sorted. Take two sorted DataFrames ... polars.DataFrame.with_columns · polars.DataFrame.to_pandas · Aggregation · Plot

25 июл. 2023 г. · Given that melt has been included mostly as a convenience for pandas users, we should follow pandas behavior here and return an empty frame.

17 февр. 2023 г. · I submitted an issue on Github, and the existing implementation was improved from O(n^2) to O(n), it is now faster than R. It is not part of ...