add exception if filter input plot wasn't successful

mlair/helpers/filter.py

@@ -274,11 +274,15 @@ class ClimateFIRFilter:
 
         # plot
         if self.plot_path is not None:
-            pos = 720
-            filter_example = filter_input_data.isel({time_dim: pos})
-            t0 = filter_example.coords[time_dim].values
-            t_slice = filter_input_data.isel({time_dim: slice(pos - length, pos + length + 1)}).coords[time_dim].values
-            self.plot(data, filter_example, var_dim, time_dim, t_slice, t0, plot_index)
+            try:
+                pos = 720
+                filter_example = filter_input_data.isel({time_dim: pos})
+                t0 = filter_example.coords[time_dim].values
+                t_slice = filter_input_data.isel({time_dim: slice(pos - length, pos + length + 1)}).coords[
+                    time_dim].values
+                self.plot(data, filter_example, var_dim, time_dim, t_slice, t0, plot_index)
+            except IndexError:
+                pass
 
         # select only values at tmp dimension 0 at each point in time
         return filt.sel({new_dim: 0}, drop=True), h, apriori