MATLAB: Plotting a rectangle in 3D space

3d plotsplot

Hi, Suppose I have four points as p1 = [x1,y1,z];p2 = [x2,y2,z];p3 = [x3,y3,z];p4 = [x4,y4,z];

If these four points form a perfect rectangle,what line of code should I write to plot this rectangle in 3D space?

Thanks.

Karthik

plot3d( [x1 x2 x3 x4 x1], [y1 y2 y3 y4 y1], [z z z z z] )

If, that is, you want it as a line. If you want it as a surface, use patch() instead of plot3d()

fimplicit3(@(x,y,z) x.^2 +4*y.^2 +9*z.^2 - 1)

Try the following script

close all
clearvars
syms x y z
z=-(x^2)/4 - (y^2)/9 +1
fsurf(z); 
xlabel('x'); ylabel('y'); zlabel('z');
vol= int( int(z, x, -1, 1  ) , y, -2, 2)

If you run it, it would give something like this: