[R] color vectors other than gray()

[Tsjerk Wassenaar]

Hi,

Have a look at:

?rainbow
?rgb
?heatmap

In my opinion this would've likely popped up with just a little effort
of searching. In fact, the help of grey() (?grey) already gives
pointers to the other color functions. Please show that you at least
have tried to find answers before posting questions on a user list.

Tsjerk

On Fri, Mar 27, 2009 at 2:16 PM, Paulo E. Cardoso <pecardoso at netcabo.pt> wrote:
> I'm trying to create a graph where different cells of a grid (a shapefile)
> will be painted with a color share scale, where the most easy way is to use
> gray().
>
> Can I somehow get a vector (gradient) of colors, a vector of colors with
> other methods but gray()?
>
> I'm doing this until now
>
>
>
>  quad_N_sp <-
> merge(sp_dist[sp_dist$sp==splist[i],],grelha_ID,by.x="quad",by.y="quadricula
> ",all.y=T,)
>
>  quad_N_sp$x[is.na(quad_N_sp$x)] <- 0
>
>  quad_N_sp <- quad_N_sp[order(quad_N_sp$id),]
>
>  paleta <- gray(1-(quad_N_sp$x)/max(quad_N_sp$x)) #! Tons de cinzento
>
>  win.graph(4,5)
>
>  plot(grelha,ol="grey80", #! Gráfico com grelha de amostragem e gradiente
> de abundância
>
>  fg=paleta,
>
>  cex.lab=0.7,
>
>  cex.axis=0.7,
>
>  cex.main=0.7,
>
>  xlab="Coord X",
>
>  ylab="Coord Y",
>
>  main=paste("Espécie: ",splist[i]),
>
>  xlim=c(210000,240000)
>
>  )
>
>  col_lab <- c(max(quad_N_sp$x),min(quad_N_sp$x)) #! Vector com os limites
> min e max do N de indivíduos observados
>
>
> color.legend(248000,120000,250000,128000,col_lab,sort(unique(paleta)),gradie
> nt="y",cex=0.6)#! Legenda
>
>  text(245300,130500,"Nº Indivíduos",cex=0.6)
>
>  plot(blocos,ol="grey40",fg=NA,add=T)
>
>
>
> I'd like to replace the grey shade by other colors.
>
>
>
> Thanks in advance
>
> ____________
>
> Paulo E. Cardoso
>
>
>
>
>        [[alternative HTML version deleted]]
>
>
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>



-- 
Tsjerk A. Wassenaar, Ph.D.
Junior UD (post-doc)
Biomolecular NMR, Bijvoet Center
Utrecht University
Padualaan 8
3584 CH Utrecht
The Netherlands
P: +31-30-2539931
F: +31-30-2537623