Re: Octave's contour function

[Jonathan M Hill]

Hello;

     I was just playing with the contour function the other day and
managed to make a simple example.  I used the online help to
construct the  example.  I'm sorry that I don't have much experience
with this.

octave:2> help contour
 usage: contour (z, n, x, y)

 See also: plot, semilogx, semilogy, loglog, polar, mesh, contour,
           bar, stairs, gplot, gsplot, replot, xlabel, ylabel, title

     Here is what I discovered; z is a rectangular matrix, the
simplest use assumes (0,0) to be the lowest corner and uses the matrix
size to get the other.  n is the number of isolines to draw, I think the
default is 11 lines.

octave> z = [
1 1 1;
1 1 2];
octave> contour(z)

     The x and y terms are optional vectors, either column or row type.
I think these are used to define other values for the x and y axes.

octave> contour(z, 4, [0 1], [0 0.5 1])

     Perhaps a few others have some comments to make?

                                              Jonathan Hill 
                                              address@hidden

On Thu, 7 Dec 2000, Fernando Fraga e Silva wrote:

> 
> I couldn't figure how to use the function "contour" by reading the info 
> manual about this one. I missed a simple example as a pattern to learn to use 
> it. Does anyone here could send me a little example about it ?
> 
> I need to plot the contour of a function f(x,y).
> 
> I'm really thanks .
> 
> ---
> Fernando Fraga e Silva
> Undergraduated Mechanical Engineering Student from University of São Paulo
> 
> 
> 
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Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
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