Re: ListPlot - assigning a list of colors to a set of points

*To*: mathgroup at smc.vnet.net*Subject*: [mg131958] Re: ListPlot - assigning a list of colors to a set of points*From*: Helen Read <readhpr at gmail.com>*Date*: Wed, 6 Nov 2013 00:36:23 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-outx@smc.vnet.net*Delivered-to*: mathgroup-newsendx@smc.vnet.net*References*: <l59r3a$rcm$1@smc.vnet.net>

Make each point a sublist (i.e, enclose in an extra set of braces). ListPlot[{{{1, 1}}, {{2, 2}}, {{3, 3}}}, PlotStyle -> {{PointSize[0.02], Red}, {PointSize[0.02], Green}, {PointSize[0.02], Blue}}] Helen Read University of Vermont On 11/4/2013 11:10 PM, Gordon Robertson wrote: > I'm using Mathematica v9.x on a Mac, with OS X 10.7.5. > > Could I ask about something that likely has a very simple solution? I have a list of XY coordinates for say 500 points that will become a scatterplot via ListPlot. I need to assign a colour to each point, using a list of labels (histology, risk, =85). > > I've generated ArrayPlot graphics for cases like this for some time. For example, given some labels in column 4 of a 'hist' table: > colours = Table[{ > Switch[name = hist[[i, 4]], > "Classical", Green, "Tall cell", Red, "Other", Blue] > }, {i, Length[hist]}]; > ArrayPlot[{colours}, AspectRatio -> 0.1, Frame -> False] > > For a ListPlot, I'd have thought that something as simple as dropping a list of colours into a PlotStyle Directive would do the job. But the following line plots three blue points, rather than a Red, Green and Blue point. > ListPlot[{{1, 1}, {2, 2}, {3, 3}}, > PlotStyle -> Directive[PointSize[0.02], {Red, Green, Blue}]] > > Is there a simple way to declare a list of colours in ListPlot? I've looked through the PlotStyle documentation, and apologize if I've missed seeing how to do this. > > Thanks very much for your help. > > Gordon > -- > Gordon Robertson > Michael Smith Genome Sciences Centre > BC Cancer Agency > Vancouver BC Canada > www.bcgsc.ca<http://www.bcgsc.ca> >