[R] colours in a pdf

[Gavin Blackburn]

Hi,

Thanks for the help. Extending the palette to 16 or 20 would be a big help. The largest number of files I've had to handle in a single group is 42 and I wouldn't expect it to get much bigger than that.

I'll take a look at RColorBrewer.

Cheers,

Gavin.

-----Original Message-----
From: R. Michael Weylandt [mailto:michael.weylandt at gmail.com] 
Sent: 04 May 2012 12:43
To: Gavin Blackburn
Cc: r-help at r-project.org
Subject: Re: [R] colours in a pdf

How many colors are you looking for? There are limits to how many the
eye can make out, but perhaps the RColorBrewer package would be a
place to start. Also check out: http://colorbrewer2.org/

To see all the builtin colors, you can simply use the colors()
function, but your viewer won't be able to distinguish most of them.

Michael

On Fri, May 4, 2012 at 7:39 AM, Gavin Blackburn
<gavin.blackburn at strath.ac.uk> wrote:
> Hi,
>
> I'm plotting PDFs and have a problem. If I have more than 8 sources of data the colours are repeated. These plots are used to remove poor data from the sets so it would be helpful if I could expand the colour range. Is there any way to do this?
>
> The plots are coloured by defining a vector colsVec<-1:(length(mzXMLfiles))
>
> And defined in the loop for (file in 1:length(mzXMLfiles))
>
> as col=file
>
> The legend is then coloured using the same vector using col=colsVec
>
> Any help would be greatly appreciated. At the moment I have to break up data into sets of 8 and hope that a large number of those are good data sets so I have an aid to identify bad sets.
>
> Thanks,
>
> Gavin.
>
> Dr. Gavin Blackburn
> SULSA Technologist
>
> Strathclyde institute of Pharmacy and Biomedical Science
> 161 Cathedral Street,
> Glasgow.
> G4 0RE
>
> Tel: +44 (0)1415483828
>
> ScotMet: The Scottish Metabolomics Facility
> www.metabolomics.strath.ac.uk<http://www.metabolomics.strath.ac.uk>
>
>
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