So basically I want the plot from this
syms x1 x2
f(x1,x2) = (x1^2 + x2 - 11)^2 + (x1 + x2^2 - 7)^2
To look like this (but using ezcontourf), and not having to explicity convert it to a matrix.
v = [0:2:10 10:10:160 160:5:175 175:2:181 200:50:500];
[x1,x2] = meshgrid(X1,X2);
f2 =(x1.^2 + x2 - 11).^2 + (x1 + x2.^2 - 7).^2;
In summary, I want to be able to change the contour color intervals in ezcontour so that I don't loose the dynamics which can be seen by comparing the two above plots--in the ezcontour plot, the whole center seems flat, where in the second plot, defined by the intervals v, it's possible to see the center is not completely flat.