MATLAB: How to make 3d graph from a 2d graph based on the 360 degree

3d plots3d plots from 2d plot

Hi all, I want to convert a simple x&y-axis 2D plot rotating around 360 degree around the 3rd dimension, let say z-axis, and form a volume like representation. The example should be like this:
x = 0:5:50; y = 100:-10:0; plot(x,y)
% I want the same graph with different y values within the interval 0:45:360 which would be represented around z-axis. How can I do this ?

Best Answer

clc; clear all ;
x = 0:5:50; 
y = 100:-10:0;
pts = [x;y] ;
plot(x,y)
th = pi/180*[0:45:360] ;
for i = 1:length(th)
    % rotation matrix 
    R = [cos(th(i)) sin(th(i)) ; -sin(th(i)) cos(th(i))] ;
    ptsr = zeros(size(pts)) ;
    for j = 1:length(x)
        ptsr(:,j) = R*pts(:,j) ;
    end
    hold on
    plot(ptsr(1,:),ptsr(2,:))
end
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