Can you provide a minimal example that we can run directly after copy
and paste (using a standard data set or dummy data)?
It's always helpful to try and nail down the core of your question
(often you'll find the answer while formulating your question in
minimal terms).
baptiste
On 27 Mar 2009, at 14:36, Paulo E. Cardoso wrote:
I'm certainly missing something.
In fact the ramp I need must be scaled according to a vector of
values (in
this case species abundance in each grid cell), as in the example
vector
below:
length(quad_N_sp$x) # where x is the abundance value
[1] 433
quad_N_sp$x
[1] 0 0 0 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 3 0 0 0 0 0 0 0 0
0 0 0 3
2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
[101] 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[201] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[301] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0
0 0 0 0
0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 1 0 2 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[401] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0
I need to discriminate shading level accordingly to the abundance
value
(level).
I don't know how to proceed.
____________
Paulo E. Cardoso
-----Mensagem original-----
De: baptiste auguie [mailto:ba...@exeter.ac.uk]
Enviada: sexta-feira, 27 de Março de 2009 13:30
Para: Paulo E. Cardoso
Cc: r-h...@stat.math.ethz.ch; r-help@r-project.org
Assunto: Re: [R] color vectors other than gray()
?colorRamp
Hope this helps,
baptiste
On 27 Mar 2009, at 13:16, Paulo E. Cardoso 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
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_____________________________
Baptiste Auguié
School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK
Phone: +44 1392 264187
http://newton.ex.ac.uk/research/emag
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_____________________________
Baptiste Auguié
School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK
Phone: +44 1392 264187
http://newton.ex.ac.uk/research/emag
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