MATLAB: Trying To Plot a 3D shape

3d plots

I want to create the above 3D shape using the given integral bounds. I want to use the bounds to create the shape in matlab.
I've already written a few lines and created the figure below. I don't know why it's showing me just a line.
What other peice of information am I missing?
Thank you.
clear, clc 
x = [0:.01:1];
xx = meshgrid(x);
zz = 1 - xx.^2;
yy = 1 - xx;
surf(xx,yy,zz)

Best Answer

You need a second output from meshgrid in order to plot ‘yy’ correctly.
Try this: 
x = 0:0.01:1;
[xx1,xx2] = meshgrid(x);
zz = 1 - xx1.^2;
yy = 1 - xx2;
zzc = zz.*(xx1 <= xx2);
mesh(xx1, yy, zzc)
xlabel('X')
ylabel('Y')
view(125, 30)
producing:
Experiment to get the result you want.
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