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Re: Nonlinear least square fitting


From: Michael Creel
Subject: Re: Nonlinear least square fitting
Date: Thu, 19 Jul 2007 12:29:54 +0200

On 7/18/07, Joh, Jungwoo <address@hidden> wrote:
Hi,

I have found one version for nonlinear least square fitting:

http://velveeta.che.wisc.edu/octave/lists/archive//help-octave.1999/msg0
0770.html

, but it only supports unbounded fittings. I want to set lower and upper
bound for this. Does anyone know if there is any other versions for
that?

Thanks,

Jungwoo

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Octave 2.9.12 has an sqp function that does minimization with bounds.
The following script finds that xopt=5, for example.
M.

1;
function a = obj(x)
      a = x^2;
endfunction

function b = bound(x)
      b = x-5;
endfunction

xin = 10;
[xopt, obj, info, iter, nf, lambda] = sqp(xin, @obj, @bound, [])


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