applied now for mixed sampling with filter too

mlair/data_handler/data_handler_mixed_sampling.py

@@ -143,7 +143,7 @@ class DataHandlerMixedSamplingWithFilterSingleStation(DataHandlerMixedSamplingSi
     def load_and_interpolate(self, ind) -> [xr.DataArray, pd.DataFrame]:
 
         start, end = self.update_start_end(ind)
-        vars = [self.variables, self.target_var]
+        vars = [self.variables, self.target_var][ind]
         stats_per_var = helpers.select_from_dict(self.statistics_per_var, vars[ind])
 
         data, self.meta = self.load_data(self.path[ind], self.station, stats_per_var, self.sampling[ind],