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") +scale_x_log10() <http://r.789695.n4.nabble.com/file/n4653389/Rplot01.jpeg> -- View this message in context: http://r.789695.n4.nabble.com/ggplot-add-a-legend-tp4653389.html Sent from the R help mailing list archive at Nabble.com.
ggplot add a legend?
3 messages · jcrosbie, Ista Zahn, Jeff Newmiller
Map year to an aesthetic and let ggplot do it for you: df2010$year <- 2010 df2011$year <- 2011 df2012$year <- 2012 dfAll <- rbind(df2010, df2011, df2010) ggplot(dfAll, aes(x=Price, y=percenCapacity, color=year) + scale_x_log10() Best, Ista
On Mon, Dec 17, 2012 at 6:03 PM, jcrosbie <james at crosb.ie> wrote:
How to I go about adding a legend to the following plot? ggplot() + geom_line(aes(x=df2010$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$percentCapacity), colour = "blue") +scale_x_log10() <http://r.789695.n4.nabble.com/file/n4653389/Rplot01.jpeg> -- View this message in context: http://r.789695.n4.nabble.com/ggplot-add-a-legend-tp4653389.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
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Normally you use melted data (see the reshape2 package) and let the scales feature build the legend for you.
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jcrosbie <james at crosb.ie> wrote:
How to I go about adding a legend to the following plot? ggplot() + geom_line(aes(x=df2010$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") +scale_x_log10() <http://r.789695.n4.nabble.com/file/n4653389/Rplot01.jpeg> -- View this message in context: http://r.789695.n4.nabble.com/ggplot-add-a-legend-tp4653389.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ 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.