Doubt about plotting on MAC OS X Catalina

[Antonio Juan]

Thanks for this awesome software. I have installed gnu plot 1.8 from brew 
package. It works well, and good integration with emacs. So it is a good 
environment for learning APL.

The only think is that when I try to plot I always get the following error:

       ⎕PLOT 0 1 ¯1 2 ¯2 3 ¯3
SYNTAX ERROR+
      ⎕PLOT 0 1 ¯1 2 ¯2 3 ¯3
      ^

I do not see anywhere, if is needed to load a workspace, or the needed for some 
environment configuration during installation. So really I do not know how to 
proceed.

Thanks for your time

Toni