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Plotiing a 3d function


From: Rafael Almeida
Subject: Plotiing a 3d function
Date: Sun, 2 Jul 2006 01:21:33 -0300

Hello,

I need to plot a function, more specifically this one
function y = rosenbrock(x)
   n = 2;
   sum = 0;
   for j = 1:n-1;
       sum = sum+100*(x(j)^2-x(j+1))^2+(x(j)-1)^2;
   endfor
   y = sum;
endfunction

But I can't figure out how can I plot it. It's suposed to be a 3d
graph. The fplot function seems to do only 2d. Or at least I couldn't
figure out how to do it. I need to plot it using level curves also.
Could anyone help me out on this one?

thanks.


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