allow legacy iosys._find_size(1, scalar)

bnavigator · bnavigator · commit f1dd0a9955da · 2020-05-14T19:19:22.000+02:00
diff --git a/control/iosys.py b/control/iosys.py
@@ -1758,6 +1758,9 @@ def _find_size(sysval, vecval):
     # None or 0, which is a valid value for "a (sysval, ) vector of zeros".
     if not vecval:
         return 0 if sysval is None else sysval
+    elif sysval == 1:
+        # (1, scalar) is also a valid combination from legacy code
+        return 1
     raise ValueError("Can't determine size of system component.")
 
 
