"Jeff " <jea@gene.dot.com> wrote in message <ittf40$ktr$1@newscl01ah.mathworks.com>...
> "Paul " <palex71@hotmail.com> wrote in message <ittd1q$ee9$1@newscl01ah.mathworks.com>...
> > "Steven_Lord" <slord@mathworks.com> wrote in message <itro83$h0v$1@newscl01ah.mathworks.com>...
> > >
> > >
> > > "Paul " <palex71@hotmail.com> wrote in message
> > > news:itr4sc$i$1@newscl01ah.mathworks.com...
> > > > "Jeff " <jea@gene.dot.com> wrote in message
> > > > <itr2qo$o1r$1@newscl01ah.mathworks.com>...
> > > >> "Paul " <palex71@hotmail.com> wrote in message
> > > >> <itr1d6$k7h$1@newscl01ah.mathworks.com>...
> > > >> > Hello,
> > > >> > This should be farily easy...
> > > >> > I have a 1000x3 matrix. I am looking to do a color plot, where column
> > > >> > #1 defines the x axis, column #2 defines the y axis, and column #3 is
> > > >> > the color.
> > > >> >
> > > >> > I would also be interested in knowing how to do a 3D plot with the same
> > > >> > matrix.
> > > >> >
> > > >> > I haven't quite been able to figure out the proper command/syntax.
> > > >> >
> > > >> > Thanks!
> > > >>
> > > >> Can you give an example of your data, and a bit more description on what
> > > >> you want your plot to look like? Specifically, how are you representing
> > > >> color in a single column.
> > > >
> > > > For the color plot, I was looking for:
> > > > Column 1  x axis
> > > > Column 2  y axis
> > > > Column 3  color point (higher value = darker color)
> > > >
> > > > Good point... How would I do a plot3 with an increasing color variation
> > > > with depth?
> > >
> > > HELP SCATTER3
> > >
> > > 
> > > Steve Lord
> > > slord@mathworks.com
> > > To contact Technical Support use the Contact Us link on
> > > http://www.mathworks.com
> >
> > Thanks for the replies.
> > Here is a better indication on what I am trying to do with a 2d plot:
> >
> > Matrix:
> > 1 2 6
> > 3 5 4
> > 8 9 5
> >
> > I need the x axis (column #1) scaled from 1 to 8
> > I need the y axis (column #2) scaled from 2 to 9
> > At (x,y) = (1,2), I need a point plotted of color value = 6 (darkest)
> > At (x,y) = (3,5), I need a point plotted of color value = 4 (lightest)
> > At (x,y) = (8,9), I need a point plotted of color value = 5 (middle)
> >
> > Thanks again!
>
> Give the following a try:
>
> matin = [ 1 2 6; 3 5 4 ; 8 9 5; 4 4 10 ; 2 2 3];
>
> scatter(matin(:,1), matin(:, 2), 100, matin(:,3), 'filled')
> axis([0 10 0 10])
> colormap(cool)
>
> Check out the help section for colormap for a list of default maps, or to create your own. I scaled the axis a bit larger than the min/max for x and y, as one of the points was being clipped. You could remove this entirely, or use an expression like (min(matin(:,1) 1) to automatically scale this.
Thanks Jeff...
That was what I needed.
Regards.
