finished fixing bug#315; ensured feature_names are not empty in PDELi…

…brary to fix last example in notebook 1
dynamicslab · Apr 25, 2023 · 0af7426 · 0af7426
1 parent f83bf20
commit 0af7426
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/pysindy/feature_library/pde_library.py b/pysindy/feature_library/pde_library.py
@@ -319,7 +319,11 @@ def derivative_string(multiindex):
         feature_names = feature_names + derivative_feature_names
 
         # Include mixed non-derivative + derivative terms
-        if self.include_interaction:
+        if (
+            self.include_interaction
+            and len(function_feature_names) > 0
+            and len(derivative_feature_names) > 0
+        ):
             feature_names = (
                 feature_names
                 + np.char.add(