 classified well data
    targinterps_df : pandas.DataFrame
        Dataframe containing lithologies and their target interpretations, depending on what the target is for this analysis (often, coarse materials=1, fine=0)
    target_col : str, default = &#39;TARGET&#39;
        Name of column in targinterps_df containing the target interpretations
    target_class, default = &#39;bool&#39;
        Whether the input column is using boolean values as its target indicator
        
    Returns
    -------
    df