Highlight Specific Contour Levels of a 2D array

I follow the example of the documentation here and I get stuck because I have an array called ``simdata`` which is 100 x 3200. I want to plot a contourf using the example I included here. How can I do this with a 2D array?

Z = peaks(100);
zmin = floor(min(Z(:))); 
zmax = ceil(max(Z(:)));
zinc = (zmax - zmin) / 40;
zlevs = zmin:zinc:zmax;
% Plot the contour lines.

figure
contour(Z,zlevs)

zindex = zmin:2:zmax;
% Retain the previous contour plot. Create a second contour plot and use zindex to highlight contour lines at every other integer value. Set the line width to 2.

hold on
contour(Z,zindex,'LineWidth',2)
hold off

Answer 1

[Voss]

Z in the example is a 2D array, so just substitute your 2D array in for Z.

That is, replace

Z = peaks(100);

with

Z = simdata;

And keep the rest of the code the same as in the example.