how to aviod the two loops

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Qiu Xu
Qiu Xu 2024-5-18
回答： Voss 2024-5-18
I have a code:
x=linspace(-10,10,10001);
y=linspace(-5,5,20001);
A=[];
for j=1:length(x)
for k=1:length(y)
A=[A;x(j),y(k)];
end
end
The computation is very slow due to the two loops, so How can I aviod the two loops in this code?
Thanks very much!

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回答（1 个）

Voss
Voss 2024-5-18 
[X,Y] = meshgrid(x,y);
A = [X(:),Y(:)];

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