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Drawing a polyhedron by giving only the vertices
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Mahshid Ghozloocheh
Apr 30, 2012, 2:37:07 PM4/30/12
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Hello,
I am writing a GUI for a simplex problem and I want to draw the feasible region polyhedron by just providing matlab with the vertices. Is that feasible?
Thanks.
I am writing a GUI for a simplex problem and I want to draw the feasible region polyhedron by just providing matlab with the vertices. Is that feasible?
Thanks.
Matt J
Apr 30, 2012, 3:14:07 PM4/30/12
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"Mahshid Ghozloocheh" wrote in message <jnmm4i$3o7$1...@newscl01ah.mathworks.com>...
You can use this FEX contribution to convert re-express the polyhedron using linear inequalities:
http://www.mathworks.com/matlabcentral/fileexchange/30892-representing-polyhedral-convex-hulls-by-vertices-or-inequalities
Then you can use this second contribution to create the plot:
http://www.mathworks.com/matlabcentral/fileexchange/9261-plot-2d3d-region
> Hello,
> I am writing a GUI for a simplex problem and I want to draw the feasible region polyhedron by just providing matlab with the vertices. Is that feasible?
==============
> I am writing a GUI for a simplex problem and I want to draw the feasible region polyhedron by just providing matlab with the vertices. Is that feasible?
You can use this FEX contribution to convert re-express the polyhedron using linear inequalities:
http://www.mathworks.com/matlabcentral/fileexchange/30892-representing-polyhedral-convex-hulls-by-vertices-or-inequalities
Then you can use this second contribution to create the plot:
http://www.mathworks.com/matlabcentral/fileexchange/9261-plot-2d3d-region
Mahshid
Apr 30, 2012, 11:28:09 PM4/30/12
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That's amazing! Thank you very much.
"Matt J" wrote in message <jnmo9v$diq$1...@newscl01ah.mathworks.com>...
"Matt J" wrote in message <jnmo9v$diq$1...@newscl01ah.mathworks.com>...
Alex V
May 1, 2012, 4:11:07 AM5/1/12
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"Mahshid" wrote in message <jnmm4i$3o7$1...@newscl01ah.mathworks.com>...
verts = [1 0 0; -1 0 0; 0 1 0;0 0 1];
faces = [1 2 4;1 3 4; 2 3 4;1 2 3];
h = patch('Faces',faces,'Vertices',verts,'FaceColor','b','EdgeColor','w')
that code creates a tetrahedron from (x,y,z) vertices p1(1,0,0), p2(-1,0,0), p3(0,1,0), p4(0,0,1), in that order, and faces defined by the polygons p1,p2,p4; p1,p3,p4;... etc
http://www.mathworks.com/help/techdoc/ref/patch.html
> Hello,
> I am writing a GUI for a simplex problem and I want to draw the feasible region polyhedron by just providing matlab with the vertices. Is that feasible?
>
> Thanks.
no, it's not possible, but what IS possible is to draw the polyhedron by giving matlab the vertices and info on how to connect them. like so:
> I am writing a GUI for a simplex problem and I want to draw the feasible region polyhedron by just providing matlab with the vertices. Is that feasible?
>
> Thanks.
verts = [1 0 0; -1 0 0; 0 1 0;0 0 1];
faces = [1 2 4;1 3 4; 2 3 4;1 2 3];
h = patch('Faces',faces,'Vertices',verts,'FaceColor','b','EdgeColor','w')
that code creates a tetrahedron from (x,y,z) vertices p1(1,0,0), p2(-1,0,0), p3(0,1,0), p4(0,0,1), in that order, and faces defined by the polygons p1,p2,p4; p1,p3,p4;... etc
http://www.mathworks.com/help/techdoc/ref/patch.html
Steven_Lord
May 1, 2012, 10:05:31 AM5/1/12
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"Alex V" <ava...@purdue.edu> wrote in message
news:jno5qr$es7$1...@newscl01ah.mathworks.com...
TRISURF, and/or TETRAMESH.
--
Steve Lord
sl...@mathworks.com
To contact Technical Support use the Contact Us link on
http://www.mathworks.com
Alex V
May 1, 2012, 5:57:06 PM5/1/12
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"Steven_Lord" <sl...@mathworks.com> wrote in message <jnoqjb$9na$1...@newscl01ah.mathworks.com>...
agreed, although i don't have much experience with those in particular - this was more a generic example of what he might have been looking for, for use in more varied applications
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