Re: fmincon - fminsearch : constrained simplex optimization in Octave?

[baptiste auguie]

Hello,

Thanks to your advice, I've installed Octave-Forge and I'm trying the  
different optimization routines available <http:// 
octave.sourceforge.net/index/optimization.html#Minimization>. Without  
much success for my first try :(

Here is the test example from fmins documentation and the result I get,

> octave:1> fmins(inline('(x(1)-5).^2+(x(2)-8).^4'),[0;0])
> error: `x' undefined near line 0 column 6
> error: evaluating binary operator `-' near line 0, column 10
> error: evaluating binary operator `.^' near line 0, column 13
> error: evaluating binary operator `+' near line 0, column 16
> error: called from `?unknown?'
> error: evaluating binary operator `*' near line 63, column 12
> error: evaluating assignment expression near line 63, column 6
> error: called from `nmsmax' in file `/sw/share/octave/2.1.72/site/m/ 
> octave-forge/optim/nmsmax.m'
> error: evaluating assignment expression near line 78, column 9
> error: called from `fmins' in file `/sw/share/octave/2.1.72/site/m/ 
> octave-forge/optim/fmins.m'

I've tried with a simpler function, in a different file (not inline),  
with the same error.

I get the same sort of error for nelder_mead_min :

> error: `x' undefined near line 3 column 4
> error: evaluating binary operator `-' near line 3, column 5
> error: evaluating binary operator `^' near line 3, column 8
> error: evaluating assignment expression near line 3, column 2
> error: called from `toto' in file `/Users/.../SPPfit/toto.m'

where toto.m is the most basic function,

> function f=toto(x)
> f=(x-2)^2;
> endfunction

same thing for samin,

> error: `x' undefined near line 2 column 10
> error: evaluating argument list element number 1
> error: evaluating binary operator `+' near line 2, column 13
> error: evaluating assignment expression near line 2, column 4
> error: called from `f' in file `/Users/.../SPPfit/f.m'
> error: evaluating argument list element number 1


Is there something wrong in my install of Octave-forge? I installed  
it using Fink for Mac OS. Octave seems to call the right functions,  
but they don't behave as I'd expect!

Best wishes

baptiste