Sorry for the lack of the plot. It's is just a simple xy plot with xvalues formated as shown in my post (strptime()).
Anyway, here a working example: > > rm(list=ls()) > > x<-c(100*1500:1559, 100*1600:1659) > x<-strptime(x, format="%H%M%S") > y<-c(CO2$conc, CO2$conc[1:36]) > > plot(x, y, pch=18, type="p", ylab="yfoo", xlab="xfoo", yaxs="r") > > abline(h=100, v=0, col="gray60", lty=2) > text.xvalue<-151500 > text.xvalue<-strptime(text.xvalue, format="%H%M%S") > text(text.xvalue, 80, "detection threshold", col="gray60", cex=0.8) > > event.1<-152833 > event.1<-strptime(event.1, format="%H%M%S") > abline(v=event.1, col="red") > > The format for the xvalues works in the case of text positioning, but doesn't in the case of abline. JimHoltman replied this topic via email with a solution: <-as.POSIXct(strptime(y, format="%H%M%S")) I still don't know why this second function is necessary since everything works without it, except for the abline-thing... Nevertheless, thanks for all the suggestions! Fritz -- View this message in context: http://www.nabble.com/abline%28v%3D-x%29-in-plot-with-time-formated-xaxis-not-working-tp24505884p24558044.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.
