flasc.utilities.energy_ratio_utilities.filter_all_nulls

flasc.utilities.energy_ratio_utilities.filter_all_nulls(df_: DataFrame, ref_cols: List[str], test_cols: List[str], ws_cols: List[str], wd_cols: List[str])

Filter dataframe for ALL nulls.

Filter data by requiring ALL values of ref, test, ws, and wd to be valid numbers.

Parameters:

• df (pl.DataFrame) -- Polars dataframe possibly containing Null values

• ref_cols (list[str]) -- A list of columns to use as the reference turbines

• test_cols (list[str]) -- A list of columns to use as the test turbines

• wd_cols (list[str]) -- A list of columns to derive the wind directions from

• ws_cols (list[str]) -- A list of columns to derive the wind speeds from

• df_ (DataFrame)

Returns:

A dataframe containing the energy ratio between the two sets of turbines.

Return type:

pl.DataFrame