Le 13.12.2005 19:34, Sérgio Nunes a écrit : >Hi, > >I'm trying to draw a 2D plot using multiple tints of red. The >(simplified) setup is the following: || year | x | y || > >My idea is that each year is plotted with a different tint of red. >Older year (lightest) -> Later year (darkest). I've managed to plot >this with different scales of grays simply by doing: > >palette(gray(length(years):0/length(years))) > >before the plot and for each year the color used is a different tint of gray. > >So, is there any way to do this for any color? >Any tip or advice? > >With this, I hope to visualize patterns in my dataset more easily. > >Thanks in advance for any help. > >Best regards, >Sérgio Nunes > > Hi,
You want to travel in the RGB space. See http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=107 plot(0, xlim=c(0,10), ylim=c(0,1)) pal <- rgb(1, 0:10/10,0:10/10) rect(xleft=0:9, xright=1:10, ytop=1, ybottom=0, col=pal) Romain -- visit the R Graph Gallery : http://addictedtor.free.fr/graphiques mixmod 1.7 is released : http://www-math.univ-fcomte.fr/mixmod/index.php +---------------------------------------------------------------+ | Romain FRANCOIS - http://francoisromain.free.fr | | Doctorant INRIA Futurs / EDF | +---------------------------------------------------------------+ ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
