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From: Erik on 19 Mar 2010 04:31
Hello!
I need some help to understand colormap. I currently have a pointcloud in a N*3 matrix with each row beeing a coordinate [X Y Z]. I can plot the raw pointcloud using plot3 (or surf) by a simple "plot3(rMap(:,1),rMap(:,2),rMap(:,3),'.')"

Now, I want to add a jet colormap to the pointcloud in order to see height differances better. I've tried running colormap(jet) etc but it doesn't work. How can I add a jet colormap to my figure? Do I need to use something else besides plot3?

I want the image to look something like the link below when done
http://img535.imageshack.us/img535/576/snapshot1n.png

Very grateful for help on my annoying problem. Sorry if I'm posting on the wrong place aswell. I'm new here.

Sincerely
/E
From: us on 19 Mar 2010 04:41
"Erik " <erija952(a)student.liu.se.remove.this> wrote in message <hnvcou$5gm$1(a)fred.mathworks.com>...
> Hello!
> I need some help to understand colormap. I currently have a pointcloud in a N*3 matrix with each row beeing a coordinate [X Y Z]. I can plot the raw pointcloud using plot3 (or surf) by a simple "plot3(rMap(:,1),rMap(:,2),rMap(:,3),'.')"
>
> Now, I want to add a jet colormap to the pointcloud in order to see height differances better. I've tried running colormap(jet) etc but it doesn't work. How can I add a jet colormap to my figure? Do I need to use something else besides plot3?
>
> I want the image to look something like the link below when done
> http://img535.imageshack.us/img535/576/snapshot1n.png
>
> Very grateful for help on my annoying problem. Sorry if I'm posting on the wrong place aswell. I'm new here.
>
> Sincerely
> /E

a hint:

help scatter3;

us
From: Erik on 19 Mar 2010 06:01
"us " <us(a)neurol.unizh.ch> wrote in message <hnvdb0$f4v$1(a)fred.mathworks.com>...
> "Erik " <erija952(a)student.liu.se.remove.this> wrote in message <hnvcou$5gm$1(a)fred.mathworks.com>...
> > Hello!
> > I need some help to understand colormap. I currently have a pointcloud in a N*3 matrix with each row beeing a coordinate [X Y Z]. I can plot the raw pointcloud using plot3 (or surf) by a simple "plot3(rMap(:,1),rMap(:,2),rMap(:,3),'.')"
> >
> > Now, I want to add a jet colormap to the pointcloud in order to see height differances better. I've tried running colormap(jet) etc but it doesn't work. How can I add a jet colormap to my figure? Do I need to use something else besides plot3?
> >
> > I want the image to look something like the link below when done
> > http://img535.imageshack.us/img535/576/snapshot1n.png
> >
> > Very grateful for help on my annoying problem. Sorry if I'm posting on the wrong place aswell. I'm new here.
> >
> > Sincerely
> > /E
>
> a hint:
>
> help scatter3;
>
> us

I believe this will solve my problem!
Thanks alot!
/E
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