Try this: plot(tsData, ylab="Values", xlab="Zeit", xaxt = "n") axis(1, time(tsData), rep(substr(month.abb, 1, 1), length = length(tsData)), cex.axis = .3, tcl = -.5) jan <- time(tsData)[cycle(tsData) == 1] # january axis(1, jan, FALSE, tcl = -1) abline(v = jan, lty = 2)
and also look at the example with main = "Fancy X Axis" in library(zoo) ?plot.zoo example(plot.zoo) On Mon, Sep 8, 2008 at 3:03 PM, KarstenW <[EMAIL PROTECTED]> wrote: > > Hello, > how is it possible to plot a time series of monthly data over several years > such that the x-axis shows the first letter of the month and displays a grid > line at every year? I am new to R and had no real success until now. I have: > >> library(utils) >> oneMonth = 1.0 / 12.0 >> tsData = ts(rnorm(103,100), start=2000, deltat=oneMonth) # goes until Jul >> 2008, real data >> plot(tsData, ylab="Values", xlab="Zeit", axes=FALSE) >> axis(2) # as is >> atX=seq(from=time(tsData)[1], to=time(tsData)[length(tsData)], >> by=oneMonth) >> labMonths= c("J","F","M","A","M","J","J","A","S","O","N","D") >> labX = rep(labMonths, length.out=length(tsData)) >> axis(1, at=atX, label=labX) > > But here I am stuck. First, I do not know how to add the years. And then, I > would like to show all the labels, but only few of the months are displayed. > > Any hint appreciated, > kind regards, > Karsten. > -- > View this message in context: > http://www.nabble.com/Time-Series-x-axis-labeling-tp19378906p19378906.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. > ______________________________________________ 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.