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

Question

SAMET YILDIZ 2016-11-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/314730-how-to-make-3d-graph-from-a-2d-graph-based-on-the-360-degree

评论： SAMET YILDIZ 2016-12-1

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 ?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

KSSV 2016-12-1

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/314730-how-to-make-3d-graph-from-a-2d-graph-based-on-the-360-degree#answer_245461

在 MATLAB Online 中打开

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

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

SAMET YILDIZ 2016-12-1

Thanks for the answer. I accepted it because your answer provides a solution what was written by me in the first place. However, my intention was to ask the question "rotation around the z-axis". I put it as 3d-graph to title, yet not on the question content. My mistake.

I edited my question. The edits are written with bold face. Thanks again.

请先登录，再进行评论。