从data.frame在ggplot图例中添加信息

我想在图例中添加具有此值的传感器的信息

这是我的密码：

z <- data.frame(
       a=c("sensor 1","sensor 2","sensor 3","sensor 4","sensor 5","sensor 6","sensor 7","sensor 8"), 
       b=c(50, 60, 70, 20,90,110,30,100)
     )

cxc <- ggplot(z, aes(x=a, y=b, fill=factor(b))) + 
         geom_bar(width = 1,stat="identity",colour = "black")  + 
         scale_fill_brewer(palette="Blues",type = "seq")+
         geom_text(aes(y = b/2,label = b),color = "red",size = 5)
cxc + coord_polar() + 
  theme_linedraw() + 
  theme(axis.ticks =element_blank(), axis.text.y =element_blank(), axis.title=element_blank(), axis.text.x=element_text(size = 12,angle = 45)) +
  guides(fill = guide_legend(title = "Value and sensor"))

---

z使用
labels
参数来
scale\u fill\u brewer
，并
order
按正确顺序排列标签

cxc <- ggplot(z, aes(x=a, y=b, fill=factor(b))) + 
  geom_bar(width = 1,stat="identity",colour = "black")  + 
  scale_fill_brewer(palette="Blues",type = "seq", labels = paste0(z$b, " (", z$a, ")")[order(z$b)])+
  geom_text(aes(y = b/2,label = b),color = "red",size = 5)
cxc + coord_polar() + 
  theme_linedraw() + 
  theme(axis.ticks =element_blank(), axis.text.y =element_blank(), axis.title=element_blank(), axis.text.x=element_text(size = 12,angle = 45)) +
  guides(fill = guide_legend(title = "Value and sensor"))

cxc您可以使用
labels
参数
scale\u fill\u brewer
@RichardTelford是的，但问题是当我放置
scale\u fill\u brewer（labels=z$a）
时，我得到了文本，但没有正确的文本作为值。我不知道怎样才能在没有手写的情况下将传感器正确地放置在数值上。