fixes #180

Author: neuromusic

visual_behavior/translator/foraging/__init__.py

@@ -187,7 +187,7 @@ def stringify(x):
     for col in forced_string:
         trials[col] = trials[col].map(stringify)
 
-    trials['change_frame'] = trials['change_frame'].map(lambda x: int(x) if np.isfinite(x) else None)
+    trials['change_frame'] = trials['change_frame'].map(lambda x: int(x) if np.isfinite(x) else None) + 1
     trials["change_image_category"] = trials["change_image_category"].apply(lambda x: x if x else '')  # use empty string instead of NoneType
     trials["change_image_name"] = trials["change_image_name"].apply(lambda x: x if x else '')  # use empty string instead of NoneType
     trials["initial_image_category"] = trials["initial_image_category"].apply(lambda x: x if x else '')  # use empty string instead of NoneType