Saving For Loop Values Into a Matrix

Question

Jim Tom 2021-10-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1570703-saving-for-loop-values-into-a-matrix

评论： Jim Tom 2021-10-24

采纳的回答： Image Analyst

for i = 0:0.1:1

for j = 0:0.1:1

if (i^2 + j^2) <= 1

u = (sqrt(i^2 + j^2))^3;

else (i^2 + j^2) > 0

u = 3*sqrt(i^2 + j^2 - 1)+1;

end

I am looking to store these u values in a matrix u, because I want to plot the surface of u. I am having a hard time storing these values in a matrix. Thanks in advance. I only want to look at u values from 0-1 also if that helps at all.

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Answer 1

Image Analyst 2021-10-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1570703-saving-for-loop-values-into-a-matrix#answer_815388

在 MATLAB Online 中打开

Try this:

alli = 0:0.1:1
allj = 0:0.1:1
for k1 = 1 : length(alli)
    i = alli(k1);
    for k2 = 1 : length(allj)
        j = allj(k2);
        if (i^2 + j^2) <= 1
            u(k1, k2) = (sqrt(i^2 + j^2))^3;
        elseif (i^2 + j^2) > 0
            u(k1, k2) = 3*sqrt(i^2 + j^2 - 1)+1;
        end
    end
end
surf(u);
colorbar