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optimizing error: undefined argument


From: DGati
Subject: optimizing error: undefined argument
Date: Tue, 16 Aug 2011 01:57:36 -0700 (PDT)

Hi octave users,

I'm currently trying out the different optimizers in the optim-package on
Octave 3.2.4, such as minimize(), line_min, or nmsmax. The file I'm
minimizing (or in case of nmsmax, I'm maximizing the file*-1) is for
simplicity's sake:

function result = func(x)
result=0.5*(x)^2-10;
endfunction

The error that I keep getting is

error: 'x' undefined near line 2, column 7
error: evaluating argument list element number 1
error: evaluating argument list element number 1

I don't understand that. How more should I define 'x'  when it is simply the
argument of the function?
Thanks for tips!

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