how to use mesh to plot 3D image

i want to plot a figure like the attached addressURL. but i cant really know how to use the "mesh". please help me and correct the code. thanks you a lot!

https://www.dropbox.com/s/bxmrdjxazc4b84k/243950433810.jpg

clc; clear; close all figure; [X,T] = meshgrid(-2:.1:2 , 2:-.1 :0); Z = (X.^2)./T;

%surf(X,T,Z) mesh(Z);

%axis([-2 2 0 2 0 2])

Answer 1

[Friedrich]

Hi,

the problem is that the plot in the book is not really correct. The funtion is a discontinoues function. All points with (x,0) doen't exist and when you plot that in ML you get Inf values at those points which makes the Z axis scales a bit unfortuante.

When you scale the Z axis a bit you can see it gets the shape in the book:

[X,Y] = meshgrid(-2:.1:2 , 0:0.1:2);
Z = (X.^2)./Y;
surf(X,Y,Z)
zlim([0 2])

If you make the stepsize for X and Y smaller you get closer to that image:

[X,Y] = meshgrid(-2:.01:2 , 0:0.01:2);
Z = (X.^2)./Y;
surf(X,Y,Z)
zlim([0 2])