On 14-02-11 6:13 PM, Peter Lomas wrote:
Hello,I'm creating graphs like the following: x <- seq(as.POSIXct("2012-01-01"), as.POSIXct("2013-01-01"), by = "days") y <- (1:length(x)*10 + cumsum(rnorm(n=length(x), mean=0, sd= 100))) plot(x,y, type = 'l', xaxt='n') axis.POSIXct(side=1,at=seq(min(x), max(x), by="months"), format = "%b \'%y", labels = TRUE) For aesthetic reasons, I would only like to print the year label (%y) on the x axis at the change points of the year. In this example, there would be a "Jan '12" and "Jan '13" with the months in between omitting the year label. Any clues would be appreciated!
Instead of labels=TRUE, compute the strings for the labels you want, and use those. For example,
ticks <- seq(min(x), max(x), by="months") full <- format(ticks, format="%b \'%y") short <- format(ticks, format="%b") labels <- ifelse (short == "Jan", full, short) axis.POSIXct(side=1,at=ticks, labels = labels) Duncan Murdoch ______________________________________________ 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.
