I forwarded this to J forum because I have no real knowledge of plot.
---------- Forwarded message ----------
From: "Andrey Paramonov" <[email protected]>
Date: Oct 4, 2014 7:07 AM
Subject: Plotting magnitudes of complex numbers in J
To: <[email protected]>
Cc:

Hi Bill,

For some reason my message to [email protected] doesn't go
through, so I thought I can shoot you an email with some strange
behaviour (bug?) I see in the plot function. Here is the snippet that
highlights the problem

   norm1=: %:@:(* +)
   norm2=: |
   norm1 3j4 12j5
5 13
   norm2 3j4 12j5
5 13
   load 'plot'
   plot norm2 3j4 12j5 NB. works
   plot norm1 3j4 12j5 NB. does NOT work

I thought you might find it interesting.

Thank you,
Andrey

P.S. I'm using j64-802.
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