Matlab中的3D（Surf）图中的Findpeaks

Question

I need to find several (~5) peaks in a 3D surf plot; tried imregionalmax but it's giving me too many maximums and I can't find a way to control it.

I guess the actual peaks I need to find is in my z array which is (x by y), but findpeaks only works for a vector array. Is there an alternative? I've read something about the function squeeze- but not entirely sure how to put it into use it.

The link is an example of the graph and the data points are the examples of the peaks I would need to know.

If anyone could shed some light on this, it'd be great, thanks!

A MCVE I used for imregionalmax is

Z = peaks;
y = linspace(1,100,49);
x = linspace(10,20,49);

[X, Y] = meshgrid(x,y);

figure
surf(X, Y, Z,'EdgeColor','none','FaceColor','interp');
maxZ = imregionalmax(Z);
plot3(X(maxZ),Y(maxZ),Z(maxZ),'r*','MarkerSize',12)

Answer 1

I am not familiarized with deterministic methods to achieve this, but if you do not find any fast solution, you could use metaheuristics to determine the local maxima of the surface.

There are a wide range of algorithms, including:

• Genetic algorithms
• Particle Swarm Optimization (PSO)
• Bees Algorithm
• ...

I think that there is a recent implementation of PSO in MATLAB, check it out: https://es.mathworks.com/help/gads/particleswarm.html