How to use 2 variable in for loop?

Question

U B 2022-8-20

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https://ww2.mathworks.cn/matlabcentral/answers/1782460-how-to-use-2-variable-in-for-loop

评论： Star Strider 2022-8-21

I want to use 2 variable in for loop. If we consider a circle then in polar coordinate I've already used r variable. Now I want to consider theta too. For eg.

i = 360;

for j =1:i

n = 1.5 ;

th(j) = j*pi/180 ;

X(j) = sin(th(j)) ;

end

figure(1)

plot(th*180/pi,X)

It give me a 1D line. Let us say for theta = 0. I want the whole range of theta from 0 to 360 to make it a 2D plot. How do I do that?

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U B 2022-8-20

移动：Star Strider 2022-8-20

I understood now, the question is not clear. The below image was in my mind when I asked the qiestion. Lets say for Theta= o line we have the set of value or sin function from the for loop. I wanted to expand the same value of sin(r) for theta 0 to 360 continousely. I'm showing only 4 theta position in the image. I'm aware its not going to be a simple code. I wanted have some input from others too.