Re: fminsearch plot tools

[Kai Torben Ohlhus]

On Wed, Dec 19, 2018 at 7:47 PM gciriani <address@hidden> wrote:

Thanks you. I searched as you suggested, but I didn't find anything for
plotting fminsearch.



-----
Giovanni Ciriani - Windows 10, Octave 4.2.1, configured for x86_64-w64-mingw32
--

Maybe you need to be more specific about what you want to plot.  If I follow Pantxos advise, I get a useful description how to plot the iteration steps by "draw_fcn":

>> demo fminsearch

fminsearch example 1:

 clf;

 hold on;

 draw_fcn = @(x) (plot (x(1), x(2)) && false);

 fcn = @(x) (x(1)-5).^2 + (x(2)-8).^4;

 x0 = [0;0];

 [xmin, fval] = fminsearch (fcn, x0, optimset ("OutputFcn", draw_fcn))

 hold off;

xmin =

   5.0000

   7.9992

fval =  0.000000000018423

Best,

Kai