Re: [R] ggplot add a legend?

2012-12-17 Thread Jeff Newmiller
Ask on the ggplot mailing list? Normally you use melted data (see the reshape2 package) and let the scales feature build the legend for you. --- Jeff NewmillerThe . . Go Live... DCN:

Re: [R] ggplot add a legend?

2012-12-17 Thread Ista Zahn
Map year to an aesthetic and let ggplot do it for you: df2010$year <- 2010 df2011$year <- 2011 df2012$year <- 2012 dfAll <- rbind(df2010, df2011, df2010) ggplot(dfAll, aes(x=Price, y=percenCapacity, color=year) + scale_x_log10() Best, Ista On Mon, Dec 17, 2012 at 6:03 PM, jcrosbie wrote: > > H

[R] ggplot add a legend?

2012-12-17 Thread jcrosbie
How to I go about adding a legend to the following plot? ggplot() + geom_line(aes(x=df2010$Price,y=df2010$percentCapacity), colour = "red") + geom_line(aes(x=df2011$Price,y=df2011$percentCapacity), colour = "green") +geom_line(aes(x=df2012$Price,y=df2012$percentCapacity), colour = "blue") +sc