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First attempt to plot


From: Peter Norlindh
Subject: First attempt to plot
Date: Tue, 21 Dec 2010 10:09:03 +0100

Hi,
 
I've been trying the following:
 
s1 = 200;
s2 = -400:10:400;
plot (s2, sqrt(s1^2 + s2^2 - s1 * s2));
 
But there seems to be a problem with the term s2^2.  I get the following error messages:
 
error: for A^b, A must be square
error: evaluating argument list element number 1
...
 
What is the problem, and how do I fix it?
 
Thanks,
hpon

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