Re: Concentration Plot
- To: mathgroup at smc.vnet.net
- Subject: [mg42665] Re: Concentration Plot
- From: "Steve Luttrell" <luttrell at _removemefirst_westmal.demon.co.uk>
- Date: Sat, 19 Jul 2003 03:19:52 -0400 (EDT)
- References: <bf8gcc$5t8$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
You could ListPlot all of the coordinates. This gives you a scatterplot that
looks like what you want.
Here is a little example of what I mean:
<<Statistics`ContinuousDistributions`
coords=RandomArray[NormalDistribution[0,0.1],{1000,2}];
ListPlot[coords,AspectRatio\[Rule]1,PlotRange\[Rule]{{-1,1},{-1,1}}];
--
Steve Luttrell
West Malvern, UK
"Urijah Kaplan" <uak at sas.upenn.edu> wrote in message
news:bf8gcc$5t8$1 at smc.vnet.net...
> Hello,
>
> I want to make a concentration plot, that is I have a large amount of x-y
> coordinates, and the vast majority congregate around three points on the
> plane. I would like to show that in a graph, either with a density plot
that
> would show three dark spots corresponding to the concentration there, or a
> 3d plot that would have z values corresponding to the number of x-y values
> in a small area. I suppose I could just test all the values to see which
> "grid" it falls into, and then color that grid the appropriate intensity
or
> z value. Is this the best way? Is there a more elegant method? Thank you
so
> much.
>
>
> --Urijah Kaplan
>
>