[R] ggplot2 adding vertical line at a certain date

[Ivan Alves]

check out geom_vline

  + geom_vline(xintercept=as.numeric(as.Date("2002-11-01")))

[you may not need to convert the date to numeric in the most recent  
ggplot2 version]

On 27 May 2009, at 20:31, stephen sefick 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"), variable =
> 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(1.1080259671261,  
> 0.732188576856918,
> 0.410334408061265, 0.458980396410056, 0.429867902470711,  
> 0.83126337241925,
> 0.602008712602784, 0.818751283264408, 1.12606382402475,  
> 0.246174719479079,
> 0.941043753226865, 0.986511619794787, 0.291074883642735,  
> 0.346361775752625,
> 1.36209038621623, 0.878561166753624, 0.525156715576168,  
> 0.80305564765846,
> 1.08084449441812, 1.24906568558731, 0.970954515841768,  
> 0.936838439269239,
> 1.26970090246036, 0.337831520417547, 0.909204325710795,  
> 0.951009811036613,
> 0.290735620653709, 0.426683515714219)), .Names = c("date", "variable",
> "value"), row.names = c(NA, -28L), class = "data.frame"))
>
> qplot(date, value, data=melt.updn, shape=variable)+geom_smooth()
>
> #I would like to add a line at November 1, 2002
> #thanks for the help
>
> -- 
> Stephen Sefick
>
> Let's not spend our time and resources thinking about things that are
> so little or so large that all they really do for us is puff us up and
> make us feel like gods.  We are mammals, and have not exhausted the
> annoying little problems of being mammals.
>
> 								-K. Mullis
>
> ______________________________________________
> R-help at 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.