# How to plot the following surface

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Atom on 10 Jun 2022
Commented: Sam Chak on 10 Jun 2022
How to plot the following surface: Which type of parametrization is required to plot it... please give me a code

Matt J on 10 Jun 2022
fsurf(@(x,y) sqrt(x.^2+y.^2)+1, [-3 3 -3 3] )
zlim([1,3]) Atom on 10 Jun 2022
Edited: Atom on 10 Jun 2022
Would you please show the axes in such a way that the intersect at the vertex (0,0,1) of the inverted cone z-axis vertical along verted upward?

Matt J on 10 Jun 2022
Edited: Matt J on 10 Jun 2022
fimplicit3(@(x,y,z) (z-1).^2-x.^2-y.^2, [-3 3 -3 3 1 3] ) Sam Chak on 10 Jun 2022
Sometimes I have troubles visualizing the geometry. Can I plot like this? It should look like an inverted cone.
x = linspace(-sqrt(2), sqrt(2), 41);
y = x;
[X, Y] = meshgrid(x, y);
Z = sqrt(X.^2 + Y.^2) + 1;
surf(X, Y, Z) Sam Chak on 10 Jun 2022
Don't mention it. Aha... now I remember. You are the one who asked how to draw a Cylindrical structure inside a Dome. It's a good learning experience.