Plot cylinder

Triangulated patch cylinder

Description

% Sample values
h = 10; % height
ra = 1.5; % radius

% Create constant vectors
tht = linspace(0,2*pi,100); z = linspace(0,h,20);

% Create cylinder
xa = repmat(ra*cos(tht),20,1); ya = repmat(ra*sin(tht),20,1);
za = repmat(z',1,100);

% To close the ends
X = [xa*0; flipud(xa); (xa(1,:))*0]; Y = [ya*0; flipud(ya); (ya(1,:))*0];
Z = [za; flipud(za); za(1,:)];

% Draw cylinder
[TRI,v]= surf2patch(X,Y,Z,'triangle');
patch('Vertices',v,'Faces',TRI,'facecolor',[0.5 0.8 0.8],'facealpha',0.8);
view(3); grid on; axis square; title('Cylinder','FontSize',12)

Acknowledgements

The author wishes to acknowledge the following in the creation of this submission:
isodd, Local min, max, nearest neighbour

• MATLAB release: MATLAB 7 (R14)

[Sean de]

The entirety of this script is in the description. Basically this is an example of how to plot one specific cylinder with one specific color in an inefficient way. It also overwrites the stock CYLINDER function that is actually useful.

[Chris Taylor]