Ackley Function 3D plot
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Ackley function has the formula of 
I have been trying to plot the same but the function is not running. Please help me to understand how to plot. Thanks in advance
function [out]=ackley(in)
x=in;
e=exp(1);
out = (20 + e-20*exp(-0.2*sqrt((1/2).*sum(x.^2,2)))-exp((1/2).*sum(cos(2*pi*x),2)));
return
x = -3:3;
y = -3:3;
[X,Y] = meshgrid(x,y);
in = [X(:), Y(:)];
out = ackley(in);
Z = reshape(out, size(X));
surf(X, Y, Z);
采纳的回答
It looks like the code stops at the line that says return. Try putting the function at the bottom of the script and ending it with the word end. Like this:
(Below I have increased the spatial resolution by doing x and y steps of 0.01. I've also turned on the lighting to make it look more 3D.)
x = -3:.01:3;
y = -3:.01:3;
[X,Y] = meshgrid(x,y);
in = [X(:), Y(:)];
out = ackley(in);
Z = reshape(out, size(X));
surf(X, Y, Z);
shading interp
camlight
material dull
function [out]=ackley(in)
x=in;
e=exp(1);
out = (20 + e-20*exp(-0.2*sqrt((1/2).*sum(x.^2,2)))-exp((1/2).*sum(cos(2*pi*x),2)));
end
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