hwPath.
It will generate either a single value for every ensemble member, if
city_specific is set to FALSE, or a value for every city, if
city_specific is set to TRUE.apply_hw_projections(hwPath, FUN, city_specific = FALSE, ...)gen_hw_set. The file at the specified filepath must
conform exactly to the format of thhwPath.
This function must only take one argument, hw_datafr, which
identifies a dataframe as generated by FUN.