Thread Subject:

surf with 3 vectors

Hello,

Is it possible to make a plot with "mesh" or "surf" with 3 vectors that consists of the x-data, y-data and z-data? I've got no ideas how i am suppose to turn my vectors in to the matrices wich those methods ask for.

My x- and y-vectors are two parameters extracted from images of people with brain tumors and the z-coordinate is how many times the specific x- and y value shows up.

Let's say I manage (with help from you of course) to make the mesh-plot, is it then possible to say that the contour lines projected into the xy-plane should be where for instance 10%,50% and 90% of the total distribution lay within? It would be a nice to visualize several tumors this way; they you can say something about if it is possible to differensiate different groups!

I would appreciate if you could help me and/or give me some ideas concerning this problem.

All best regards,
Octavian

From now on i shall start reading the manuals on mathworks :)

This pages gives all the answers together with the function contour.

http://www.mathworks.com/support/tech-notes/1200/1212.html

:D

"Octavian " <ingvar_andersen@hotmail.com> wrote in message <gus4g0$o66$1@fred.mathworks.com>...
> Hello,
>
> Is it possible to make a plot with "mesh" or "surf" with 3 vectors that consists of the x-data, y-data and z-data? I've got no ideas how i am suppose to turn my vectors in to the matrices wich those methods ask for.
>
> My x- and y-vectors are two parameters extracted from images of people with brain tumors and the z-coordinate is how many times the specific x- and y value shows up.
>
> Let's say I manage (with help from you of course) to make the mesh-plot, is it then possible to say that the contour lines projected into the xy-plane should be where for instance 10%,50% and 90% of the total distribution lay within? It would be a nice to visualize several tumors this way; they you can say something about if it is possible to differensiate different groups!
>
> I would appreciate if you could help me and/or give me some ideas concerning this problem.
>
> All best regards,
> Octavian

I don't cleary understad what your problem is but I thing one of this tools can be good:

http://giaccariluigi.altervista.org/blog/

http://www.mathworks.com/matlabcentral/fileexchange/22185

http://www.mathworks.com/matlabcentral/fileexchange/22595

http://www.mathworks.com/matlabcentral/fileexchange/23447