Matlab Countour Plot with trace

[poster]

How can I plot the following data onto a contour instead?

close all;

clear all;

clc;

syms x 

f=@(x) -100.*(x(2)-x(1).^2).^2+ (1-x(1)).^2;

x0=[-9, 1];

options=optimset('display', 'iter', 'TolX',1e-6); 

%options = optimset('PlotFcns',@optimplotfval);

x=fminsearch(f, x0, options)

a= %need help pulling this from fminsearch    [a,b,c]=fminsearch(f,x0,options] ???

b=%need help pulling this from fminsearch

fcontour(f, 'Fill', 'On');

hold on;

plot(a,b,'*-r');

xlim([-50 50]);

ylim([0 45]);plot

I would like to plot the point (a,b) for which the function is minimum on a contour tracing convergence towards the center.

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