2013-08-23 89 views
29

我有以下腳本,它假設 創建一個具有兩列圖例的圖。在ggplot中創建多列圖例

#!/usr/bin/Rscript 
library(ggplot2) 
library(plyr) 
library(reshape2) 
library(scales) 

file <- "http://dpaste.com/1354089/plain/"; 
dat <-read.table(file,header=TRUE); 
datm <- melt(dat) 

# Plot them 
ggplot(datm,aes(x = variable,y = value,fill = Term)) + 
geom_bar(position = "fill") + 
scale_y_continuous(labels = percent_format())+ 
theme(legend.direction ="vertical",legend.position = "bottom")+ 

guides(color=guide_legend(ncol=2))+ # this doesn't seem to work 

ggsave(file="~/Desktop/test.pdf",width=11,height=11) 

但是它創建了一個數字,而不是 enter image description here

我如何做是正確的?

回答

60

您必須將引導到正確的審美和你使用的填充:

guides(fill=guide_legend(ncol=2)) 

而且你應該照顧的警告與geom_bar

+0

+1了簡潔的回答。任何建議,如何解決警告? – neversaint