On Mon, Jun 1, 2009 at 2:18 PM, stephen sefick <ssef...@gmail.com> wrote: > library(ggplot2) > > melt.updn <- (structure(list(date = structure(c(11808, 11869, 11961, 11992, > 12084, 12173, 12265, 12418, 12600, 12631, 12753, 12996, 13057, > 13149, 11808, 11869, 11961, 11992, 12084, 12173, 12265, 12418, > 12600, 12631, 12753, 12996, 13057, 13149), class = "Date"), site = > structure(c(1L, > 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, > 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L), .Label = c("unrestored", > "restored"), class = "factor"), value = c(1.10799962473684, 0.732152347032395, > 0.410438861475827, 0.458941230025228, 0.429883166858706, 0.831083728521569, > 0.601942073736539, 0.81855597155132, 1.12612228239269, 0.246006569972335, > 0.940239233910111, 0.98645360143702, 0.291191536260016, 0.346271105079473, > 1.36216149279675, 0.878585508942967, 0.525184260519839, 0.803247305232454, > 1.08086182748669, 1.24915815325761, 0.971046497346528, 0.936835411801682, > 1.26957337598606, 0.337691543740682, 0.90931142298893, 0.950891472223867, > 0.290354002109368, 0.426509990013021)), .Names = c("date", "site", > "value"), row.names = c(NA, -28L), class = "data.frame")) > > #I would also like to add tick marks to this graph is possible with no > label for the months in between the years > qplot(date, value, data=melt.updn, shape=site, ylab="Distance" > ,main="Euclidean Distances Time Series", xlim=c(as.Date("2002-1-1"), > as.Date("2006-3-1")))+geom_line()+theme_bw()+geom_vline(x=as.numeric(as.Date("2002-11-01"))) > + opts(panel.grid.major = theme_line(colour="grey", size=0.75), > panel.grid.minor=theme_line(colour="grey", size=0.25))
Unfortunately that's currently not possible - tick marks are always associated with major grid lines, and more importantly currently scale_date only lets you specify the time between ticks, not their labels. Are the minor monthly grid lines not good enough? Hadley -- http://had.co.nz/ ______________________________________________ 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.