Thanks very much Greg and Mark for your attention. The function that Greg created did the trick perfectly. Once more thank you, I'll never be able to figure it out by myself, at least not in time. I'm still unable to write my own functions, but I'm working on it.
Rodrigo. -----Mensagem original----- De: Greg Snow [mailto:greg.s...@imail.org] Enviada em: sexta-feira, 24 de abril de 2009 18:23 Para: Rodrigo Aluizio; R Help Assunto: RE: [R] Text Contrast in a Plot Try this function as one approach: shadowtext <- function(x, y=NULL, labels, col='white', bg='black', theta= seq(pi/4, 2*pi, length.out=8), r=0.1, ... ) { xy <- xy.coords(x,y) xo <- r*strwidth('A') yo <- r*strheight('A') for (i in theta) { text( xy$x + cos(i)*xo, xy$y + sin(i)*yo, labels, col=bg, ... ) } text(xy$x, xy$y, labels, col=col, ... ) } And here is an example of use: plot(1:10, 1:10, bg='aliceblue') rect(3,3,5,8, col='navy') text(5,6, 'Test 1', col='lightsteelblue') shadowtext(5,4, 'Test 2', col='lightsteelblue') Hope this helps, -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Rodrigo Aluizio > Sent: Friday, April 24, 2009 8:12 AM > To: R Help > Subject: [R] Text Contrast in a Plot > > Hi List, > > I would appreciate any suggestion on how can I make a text I've > inserted in a plot show some contrast? With this I mean that I have a > white text on a plot and I would like to make a tiny border around it > in black, so even being small sized and the entire graphic being small > in the text page I'll insert it. It will be visible. > > > > Well I tried inserting a box() function inside the text() function, R > accepts the command but there is no effect. I even tried to plot a > greater black text and then a smaller white one at the same place, but > it doesn't look good. > > > > Any ideas! > > > > Bellow is my plot code without the above mentioned attempts. I'd like > to add this effect at the second text() command. > > > > png('BaseMap.png',width=5.2,height=3.6,pointsize=5,units='in',bg=NA,res > toreC > onsole=T,res=1200) > > par(mar=c(5,0,0,0)) > > map('worldHires','brazil',ylim=c(-5.15,-4.55),xlim=c(-37,- > 36.1),type='n') > > rect(-37.1,-5.25,-36,-4.9,density=NULL,angle=45,col='#dbf4ff',border=F) > > plot(Batimetria,ylab='',xlab='',border=F,col=Cor$Cor,add=T) > > plot(Municipios,ylab='',xlab='',col=rgb(245,232,140,max=255,alpha=255), > add=T > ,lwd=0.2) > > axis(1,xaxp=c(-37,-36.1,5),cex.axis=1.5) > > axis(2,yaxp=c(-5.15,-4.55,5),cex.axis=1.5) > > text(Prof$Long,Prof$Lat,rownames(Prof),col='black',cex=0.9,srt=- > 24,font=2) > > text(c(-36.96,-36.96,-36.865,-36.54,-36.37,-36.2),c(-4.96,-5.05,-5.11,- > 5.14, > -5.14,-5.14),c('Areia > > Branca','Serra > > do Mel','Porto do > Mangue','Macau','Guamaré','Galinhos'),col='Black',cex=1.3,font=2) > > rect(-36.20,-4.56,-36.155,- > 4.565,density=NULL,angle=45,col='black',border='b > lack',lwd=0.1) > > rect(-36.155,-4.56,-36.111,- > 4.565,density=NULL,angle=45,col='white',border=' > black',lwd=0.1) > > text(c(-36.20,-36.155,-36.111,-36.215),c(-4.573,-4.573,-4.573,- > 4.562),c('0', > '5','10','km'),col='white',cex=1) > > Norte(-36.155,-4.60,0.02) > > box(which='plot',lty='solid') > > dev.off() > > > > Thanks in advance! > > > > ------------------------------------------------------------- > > MSc. <mailto:r.alui...@gmail.com> Rodrigo Aluizio > > Centro de Estudos do Mar/UFPR > Laboratório de Micropaleontologia > Avenida Beira Mar s/n - CEP 83255-000 > Pontal do Paraná - PR - Brasil > > > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
