You need to specify the group aesthetic - that defines how observations are grouped into instances of a geom.
Hadley On Tue, Mar 15, 2011 at 8:37 AM, joeP <joseph.parr...@bt.com> wrote: > Hi, > > This seems like there should be a simple answer, but having spent most of > the day trying to find it, I'm becoming less convinced and as such am asking > it here. > > Here's a sub-set of my data (a data.frame in R): > > myDF > time value trial > 1 2011-03-01 01:00:00 64092 FALSE > 2 2011-03-01 02:00:00 47863 FALSE > 3 2011-03-01 03:00:00 43685 FALSE > 4 2011-03-01 04:00:00 44821 TRUE > 5 2011-03-01 05:00:00 48610 TRUE > 6 2011-03-01 06:00:00 44856 TRUE > 7 2011-03-01 07:00:00 55199 TRUE > 8 2011-03-01 08:00:00 69326 FALSE > 9 2011-03-01 09:00:00 84048 FALSE > 10 2011-03-01 10:00:00 81341 FALSE > > >From this, I can plot a simple time-series in ggplot: > > ggplot(myDF, aes(time,value)) + geom_line() > > but I'd like to change the colour of the line based on whether the trial > value is TRUE or FALSE, so I try: > > ggplot(myDF, aes(time,value)) + geom_line(aes(colour=trial)) > > but this draws a line from the value on row 3 to that on row 8 (essentially > plotting TRUE and FALSE as separate data-sets). I've tried using various > other geometries (inc. geom_path()) but all have produced similar events. > Is there a way I can plot the time-series in a continuous way (i.e. as one > data-set) and change only the colour of the line? > > Thanks, > Joe > > > -- > View this message in context: > http://r.789695.n4.nabble.com/Changing-colour-of-continuous-time-series-in-ggplot2-tp3356582p3356582.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. > -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University 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.
