Resolve "implement lazy data preprocessing"

Closes #292 (closed)

mlair/data_handler/data_handler_mixed_sampling.py

@@ -204,7 +204,7 @@ class DataHandlerSeparationOfScalesSingleStation(DataHandlerMixedSamplingWithFil
         time_deltas = np.round(self.time_delta(self.cutoff_period)).astype(int)
         start, end = window, 1
         res = []
-        window_array = self.create_index_array(self.window_dim.range(start, end), squeeze_dim=self.target_dim)
+        window_array = self.create_index_array(self.window_dim, range(start, end), squeeze_dim=self.target_dim)
         for delta, filter_name in zip(np.append(time_deltas, 1), data.coords["filter"]):
             res_filter = []
             data_filter = data.sel({"filter": filter_name})