Murray, I noticed the plot error message in lesson 15. I believe the lesson said if you get an error message, then `load 'plot'`. Could you try that, please.
Your comment that jhs has to be shut down and restarted is a little bit of a surprise. If that can be confirmed, I will try to add a warning in the video. Thanks, -- (B=) ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
