Legends in ggplot2

May 22, 2011

(This article was first published on Shige's Research Blog, and kindly contributed to R-bloggers)

A simple plot takes a few lines of coding:

g1 <- ggplot(d, aes(birth.year))

g2 <- g1 + geom_line(aes(y=alive0, linetype="Famale")) +
geom_line(aes(y=alive1, linetype="Male")) + scale_linetype_discrete(name = "")

g3 <- g2 + geom_point(aes(y=alive0, shape="Famale")) +
geom_point(aes(y=alive1, shape="Male")) + scale_x_continuous("") + scale_y_continuous("Proportion Alive in 1982") + opts(legend.position=c(.24, .95), legend.justification = c(1, 1)) + scale_shape_discrete(name="")

g4 <- g3 + labs(fill="")