This is amazing! It was very useful for my purpose (I am developing a GUI to show the steps that simplex takes to solve an optimization problem). But I have a question: is it possible to draw different faces of the polyhedron with different colors? I like to have some nice and colorful figure for the feasible region of the problem which is a polyhedron.
Thanks for a nice package - it saved me quite some time! A hint to users: You get the error "Vector must have 4, 6, or 8 elements." if you specify an unfeasible set, i.e. if your A and b are such that no x fulfill Ax >= b. In my case, it was because I happened to define the normal vectors so they point out instead of in, i.e., the sign of A was reversed.
13 Oct 2008
very good! just what i need for my thesis. Thanks!
Juan Carlos: You can close your polyhedron by adding goods upper and lower bounds.
03 Jul 2008
18 Dec 2007
Juan Carlos Trillo
I was looking for something similar, great!
Only one question, how can one do to appropiately define the planes to plot general closed regions?
05 Dec 2007
I think it is very useful.
26 Nov 2007
22 Oct 2007
16 Jun 2007
I am sure this works well, but it needs clearer documentation. I simply cannot understand the format.
"The region(s) x is a subset of R2/R3 s.t. A*x>=b and lb<=x<=ub" is rather cryptic.
30 May 2007
12 Feb 2007
07 Feb 2007
26 Sep 2006
Amir Ali Ahmadi
After hours of playing around with different m-files, trying to figure out how to fill the region b/w the intersection of some planes in R^3, I found this m-file which took care of the job in less than a minute.
Matlab has a built-in function ?area? for 2-D but nothing for 3-D (to my understanding).
I used plotregion.m to visualize a subset of R^3 where all the vectors have norm-1 less than say 3. (i.e. abs(x)+abs(y)+abs(z)<=3). This is easily done using this m-file by inputting an 8x3 constraint matrix A.
Thanks a lot & great work?
15 Feb 2006
Just what I needed. Thanks.
06 Dec 2005
Splendid. A very nice utility that I'll happily use. I'd have
liked more documentation in the help, but I tend to go
overboard there myself, so my standards may be deemed
excessive by sane, rational beings. The examples were
enough to figure it out.
07 Dec 2005
17 Jan 2006
John D'Errico had an idea how to do the program more user-friendly. That was by adding simpe bounds, lb & ub, to the arguments. So I did.