From help-octave-request at bevo dot che dot wisc dot edu Thu Jul 17 21:52:01 2003
Subject: Help with functions
From: "Fausto Arinos de A. Barbuto" <fausto_barbuto at yahoo dot ca>
To: help-octave at bevo dot che dot wisc dot edu
Date: Thu, 17 Jul 2003 20:50:56 -0600

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Hello,

	Maybe I am too new to Octave, maybe I should read the 356-page
manual carefully or maybe I'm too dumb. Or all the above. :-)  However,
I have a question and thought you might help me.

	In Octave, if I do:

 >> t = 0:0.01:2*pi
 >> y = exp(-2.0*t)
 >> z = cos(t)
 >> plot (t, y, t, z)

	I get two nicely done plots of sin and cosine functions. However,
if I do:

 >> t = 0:0.01:2*pi
 >> y = exp(-2.0*t)
 >> z = cos(t)
 >> plot (t, y*z)

all I get is an error. I figured out already why this happens; it is
because "y" and "z" are arranged in 1xN matrices and the multiplication
of 1xN (N not equal to 1) by another 1xN matrix is not possible. Very
well. But then I am stuck. How do I plot a map of the exp(-2*t)*cos(t)
function? Defining w = exp(-2.0*t)*sin(t) doesn't help, either.

	The obvious question is then: how do I do that?

Many thanks in advance!

---Fausto

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