在MATLAB中迭代函数

Question

Incredibly simple question, but I think I'm unable to come up with the correct terminology to google search it.

If I have a snippet of code that relies on three independent variables:

code(x,y,z)

That produces two values, ie:

output1, output2

How do I go about iterating like so (pseudocode):

for x

    for y

        for z

            code(x,y,z)

        end

    end

end

And have data I can parse to generate 3D graphs such as

surf(x,y,output1)

A naive solution I came up with was just to create a bin of n length and then iterating one variable n times to come up with a 2D graph, ie:

x_axis = zeros(1,25)

for m = 1:25

    xm = x + 1
    x_axis(m) = xm

    code(x,y,z)

Even a referral to some documentation would be extremely helpful.

Thanks!

Answer 1

Brute force approach:

for x=[1:50]
    for y=[1:50]
        for z=[1:50]
            result(y,x,z)=code(x,y,z);
        end
    end
end

More paradigmatic approach (in MATLAB) is to meshgrid it, and pump those in.

[XX,YY,ZZ]=meshgrid([1:50],[1:50],[1:50]);
result=code(XX,YY,ZZ);