add error message for empty iir_params to partially address simonsobs…

…#969
susannaaz · Dec 9, 2024 · 9bad916 · 9bad916
1 parent 5f4dc47
commit 9bad916
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/sotodlib/tod_ops/filters.py b/sotodlib/tod_ops/filters.py
@@ -510,6 +510,9 @@ def iir_filter(freqs, tod, b=None, a=None, fscale=1., iir_params=None,
                                              sub_iir_params['fscale'] != _fscale,])):
                             raise ValueError('iir parameters are not uniform.')
             iir_params = sub_iir_params
+            # check if iir_params from axis manager are None
+            if iir_params['a'] is None or iir_params['b'] is None:
+                raise ValueError('axis manager iir parameters are empty')
         try:
             a = iir_params['a']
             b = iir_params['b']