On Thu, Aug 2, 2012 at 5:53 PM, Jose Narillos de Santos <narillosdesan...@gmail.com> wrote: > Many thanks Eik it works properly. > > what I don´t know exactly is why you put > c(xv,rev(xv)),c(efinal,rev(efinal2)),col="red" inside polygon. I see it > works but for the moment I don´t really see the meaning of c() and why is > needed to put twice and so on.
c() is for combining vectors [think "concatenate"] and the reason you have to combine xy with xy-reversed is to draw both sides of the polygon: imagine I asked you to draw a square without raising your pencil. However you do it, you'll go opposite directions along the top and the bottom. Same idea leads to the rev() inside polygon. > > If I had a vector of dates associated with each row (imagine t.csv) > > t<-read.csv("t.csv") > > tp<-as.Date(t[,2], format="%d/%m/%Y") > > I see that if I put > > plot(efinal, tp. ylim=range(c(efinal,efinal2)),type="n",ylab="") > xv<-seq_along(efinal) > polygon(c(xv,rev(xv)),c(efinal,rev(efinal2)),col="red") > > Maybe this helps: tframe <- data.frame(dat = 1:10, day = Sys.Date() + 1:10) # t is a bad variable name because there's a t = transpose function which is really important plot(dat ~ day, data = tframe) with(tframe, polygon(c(day, rev(day)) + 0, c(dat, rep(0, length.out = length(dat))), col = "blue")) Best, Michael > It doesn´t work. > > I can use xaxt="n" but it will be ok to put associated "date" on x axis. > > Sorry in advance if I only ask but it is difficoult to me, anyway many > thanks and I will keep on trying. Many people (with some original reason) > get ennoyed for some silly questions, so I send many thanks for read me and > try to help me. > > Many, many thanks. > ______________________________________________ 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.