def condition_indices(df):
    '''
    Returns a pandas Series with condition indices of the df columns.

    Args:
        df: pandas DataFrame with columns to run diagnostics on
    '''
    eigvals = eigenvalues(df)
    cond_idx = np.sqrt(eigvals.max() / eigvals)
    return pd.Series(cond_idx, df.columns, name='Condition index')
Returns a pandas Series with condition indices of the df columns.

    Args:
        df: pandas DataFrame with columns to run diagnostics on