How to generate 3D surface from 2D graph

5 views (last 30 days)
Khalid Hasan on 22 Feb 2018
Edited: Chunru on 11 May 2022
Hi everyone, I am trying to generate a 3D surface from a 2D graph, but haven't succeeded yet. Please help me if there is any possible way to do it. I have attached the code, the equation, corresponding 2D graph, and possible shape which i want to generate. Thank you in advance.
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code:
a=0:0.1:2.4
c=sqrt(a.^2+4)
p=23e-7./(c.^6)
plot(a,p)
xlabel('Distance')
ylabel('power')
Asser Abdelgawad on 10 May 2022
Try using the cylinder() function, though that only works if you are rotating about the x-axis to generate your 3D surface.

Chunru on 11 May 2022
Edited: Chunru on 11 May 2022
a = (0:0.1:2.4)';
theta = 0:360;
c= sqrt(a.^2+4);
p = 23e-7./(c.^6);
pp = repmat(p', [length(theta) 1]);
[aa, tt] = meshgrid(a, theta);
xx = aa.*cosd(tt);
yy = aa.*sind(tt);
figure
plot(a,p)
xlabel('Distance')
ylabel('power')
% whos
figure
surf(xx, yy, pp, 'EdgeColor', 'none')
% Alternatively
a = (-2.4:0.1:2.4)';
x = a; y = a;
[xx, yy] = meshgrid(x, y);
pp = 23e-7./(xx.^2+yy.^2+4).^3;
figure
surf(xx, yy, pp, 'EdgeColor', 'none')