在ggplot2中图例,删除级别 [英] Legend in ggplot2, remove level

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问题描述

我的数据:

  df < -  data.frame(sp = c(LETTERS [1:8]), 
tr = c(NS,LS,NS,LS,LS,HS,HS,HS),
bv = c ,5,11,5.6,21,5.4,2,4.8),
av = c(0.0,14,21,48.4,15,55.6,37,66.2))

我做棒图

 图书馆(重新定形2)
df1 < - melt(df,id.vars = c(sp,tr))

ggplot(aes(sp,value,fill = variable) ,data = df1)+ theme_classic()+
geom_bar(aes(lty = tr),lwd = 1.2,data = df1,stat =identity,color =black,width = .8)+
主题(legend.position =bottom)+
scale_linetype_discrete(name =ja)

输出

我不喜欢的是传说。我想从第二部分 ja 中输入行类型,并删除变量部分。我希望在图例框中有白色背景,而不是灰色背景。 您可以移除<$通过在指南中设置 fill = FALSE ,c $ c> variable 在 guide_legend (也位于 guides 中)的背景色 override.aes )如下:

  ggplot(df1,aes(sp,value,fill = variable))+ 
geom_bar( aes(lty = tr),lwd = 1.2,stat =identity,color =black,width = .8)+
scale_linetype_discrete(name =ja)+
guides(fill = FALSE,
lty = guide_legend(override.aes = list(lty = c('dotted','dashed','solid'),
fill =white)))+
theme_classic()+
主题(legend.position =bottom)

如下图所示:


My data:

df <- data.frame(sp = c(LETTERS[1:8]),
                 tr = c("NS", "LS", "NS", "LS", "LS", "HS", "HS", "HS"),
                 bv = c(14, 5, 11, 5.6, 21, 5.4, 2, 4.8),
                 av = c(0.0, 14, 21, 48.4, 15, 55.6, 37, 66.2))

I do the bar plot

library(reshape2)
df1 <- melt(df, id.vars = c("sp", "tr"))

ggplot(aes(sp, value, fill = variable) , data = df1) + theme_classic() + 
  geom_bar(aes(lty = tr), lwd = 1.2, data = df1, stat = "identity", colour = "black", width =.8) + 
  theme(legend.position = "bottom" ) +
  scale_linetype_discrete(name = "ja") 

Output What I does not like is the legend. I'd like to have just the lines type from the second part "ja" and remove "variable" part. I'd like to have the white background in the legend boxes, not the grey one.

解决方案

You can remove the variable legend by setting fill = FALSE in guides and you change the backgroundcolor with override.aes in guide_legend (also inside guides) as follows:

ggplot(df1, aes(sp, value, fill = variable)) + 
  geom_bar(aes(lty = tr), lwd = 1.2, stat = "identity", colour = "black", width =.8) + 
  scale_linetype_discrete(name = "ja") +
  guides(fill = FALSE,
         lty = guide_legend(override.aes = list(lty = c('dotted', 'dashed', 'solid'),
                                                fill = "white"))) +
  theme_classic() +
  theme(legend.position = "bottom")

this results in the following plot:

这篇关于在ggplot2中图例,删除级别的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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