我有以下情节:
ggplot(proba[108:140,], aes(c,four, color="a1")) +
geom_line(linetype=1, size=0.3) +
scale_x_continuous(breaks=seq(110,140,5)) +
theme_bw() +
theme(axis.line = element_line(colour = "black", size=0.25),
panel.grid.major = element_blank(),
panel.grid.minor = element_blank(),
panel.border = element_blank(),
panel.background = element_blank()) +
theme(axis.text.x = element_text(angle = 0, hjust = +0.5, size=6,color="black")) +
theme(axis.text.y = element_text(angle = 0, hjust = -100, size=6, color="black")) +
theme(axis.ticks=element_line(colour="black",size=0.25)) +
xlab("\nTime-steps")+ylab("Proportion correct\n") +
theme(axis.text=element_text(size=8),
axis.title=element_text(size=8)) +
geom_line(aes(c,three, color="a2"), size=0.2, linetype=2) +
geom_line(aes(c,one, color="a3"),linetype=3, size=0.8) +
geom_line(aes(c,two, color="a4"), linetype=1, size=0.6) +
scale_color_manual(values=c("a1"="red3", "a2"="red3","a3"="blue3","a4"="blue3")) +
theme(legend.title = element_text(colour="black", size=7)) +
theme(legend.position="bottom" ,
legend.direction="horizontal",
legend.title=theme_blank()) +
theme(legend.text=theme_text(size=7),
legend.background=theme_blank(),
legend.key=theme_blank())
图上的四条线以不同的线型显示,但图例并未显示这些不同的线型,仅显示不同的颜色。我显然在 theme() 中遗漏了一个非常简单的论点,但我无法弄清楚它是什么。也许我需要在 scale_colour_manual() 中再次指定线型?
这是数据:https ://dl.dropboxusercontent.com/u/22681355/proba.csv
proba<-read.csv("proba.csv",head=T)