[R] Time Series x-axis labeling

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 =

Re: [R] Time Series x-axis labeling

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