apply proposed changes

mlair/helpers/filter.py

@@ -214,6 +214,7 @@ class ClimateFIRFilter(FIRFilter):
         h = []
         if self.sel_opts is not None:
             self.sel_opts = self.sel_opts if isinstance(self.sel_opts, dict) else {self.time_dim: self.sel_opts}
+            self._check_sel_opts()
         sampling = {1: "1d", 24: "1H"}.get(int(self.fs))
         logging.debug(f"{self.display_name}: create diurnal_anomalies")
         if self.apriori_diurnal is True and sampling == "1H":
@@ -303,6 +304,10 @@ class ClimateFIRFilter(FIRFilter):
             except Exception as e:
                 logging.info(f"Could not plot climate fir filter due to following reason:\n{e}")
 
+    def _check_sel_opts(self):
+        if len(self.data.sel(**self.sel_opts).coords[self.time_dim]) == 0:
+            raise ValueError(f"Abort {self.__class__.__name__} as no data is available after applying sel_opts to data")
+
     @staticmethod
     def _next_order(order: list, minimum_length: Union[int, None], pos: int, window: Union[str, tuple]) -> int:
         next_order = 0