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# Plot a cyinder with height from one value to another

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F.O on 4 Nov 2017
Commented: Star Strider on 5 Nov 2017
I want to plot a cylinder with height that goes from -4 to 4 and radius 2?

#### 3 Comments

John D'Errico on 4 Nov 2017
What have you tried? If nothing, why not? Did you read the help for cylinder? WHY NOT?
Stephen Cobeldick on 4 Nov 2017
F.O on 5 Nov 2017
Yes, I have read that but it didn't tell you how to change the height or make it go from negative values to positive values which we always have in mathematics problems.

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### Accepted Answer

Star Strider on 5 Nov 2017
I can’t determine if this is a homework assignment or not.
The plot is straightforward:
r = 2;
t = linspace(0, 2*pi);
cyl = [r*cos(t); r*sin(t)];
figure(1)
plot(cyl(1,:), cyl(2,:))
figure(1)
surf([cyl(1,:); cyl(1,:)], [cyl(2,:); cyl(2,:)], [-4*ones(1,size(cyl,2)); 4*ones(1,size(cyl,2))])
grid on
axis equal

#### 2 Comments

F.O on 5 Nov 2017
Not assignment but i wanted to plot a cylinder with a plane thate intersect with it to calculate the line integral over the curve of intersection
Star Strider on 5 Nov 2017
My code will plot the cylinder, as you requested.
I leave the rest to you.

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