在R(ggplot2)中创建密度图的手动图例 [英] create a manual legend for density plots in R (ggplot2)
问题描述
我想为图表添加一个图例。我在网上找到的所有解决方案都使用scale_color_manual - 但它不适合我。传说在哪里?
这里是我的代码:
pre $ library $ g $ p $ b $ ggplot()+
geom_density (aes(x = rnorm(100)),color ='red')+
geom_density(aes(x = rnorm(100)),color ='blue')+
xlab )+ ylab(Density)+ ggtitle('Age Densities')
theme(legend.position ='right')+
scale_color_manual(labels = c('first','second'), values = c('red','blue'))
<如果由于某种原因,你绝对需要这两个geoms来承担不同的数据源,请将 aes()中的
color = XXX
code>,然后使用命名向量手动定义颜色:
ggplot()+
geom_density(aes(x = rnorm(100),color ='first'))+
geom_density(aes(x = rnorm(100),color ='second'))+
xlab )+ ylab(Density)+ ggtitle('Age Densities')+
主题(legend.position ='right')+
s我们可以通过下面的例子来说明这个问题:a。cale_color_manual(values = c('first'='red','second'='blue'))
I want to add a legend to my graph. All solutions I found online use scale_color_manual - but it's not working for me. Where is the legend? Here is my code:
library(ggplot2)
ggplot() +
geom_density(aes(x = rnorm(100)), color = 'red') +
geom_density(aes(x = rnorm(100)), color = 'blue') +
xlab("Age") + ylab("Density") + ggtitle('Age Densities')
theme(legend.position = 'right') +
scale_color_manual(labels = c('first', 'second'), values = c('red', 'blue'))
If for some reason you absolutely need the two geoms to take on different data sources, move the color = XXX
portion inside aes()
for each, then define the colors manually using a named vector:
ggplot() +
geom_density(aes(x = rnorm(100), color = 'first')) +
geom_density(aes(x = rnorm(100), color = 'second')) +
xlab("Age") + ylab("Density") + ggtitle('Age Densities') +
theme(legend.position = 'right') +
scale_color_manual(values = c('first' = 'red', 'second' = 'blue'))
这篇关于在R(ggplot2)中创建密度图的手动图例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!