scale_fill_discrete不会更改标签名称

Question

我试图在使用ggplot更改图的图例中的标签名称时出现问题。

我来读一些关于Cookbook for R这个主题的教程和关于本论坛同一主题的问题（How do I manually change the key labels in a legend in ggplot2）等等。我写这个的原因是因为我无法理解我的ggplot函数使得scale_fill_discrete（）在其他示例中不起作用。

我的数据帧是一样的东西：

  x w t 
1 0.8972208 A 0 
2 0.8312684 A 1 
3 0.7504638 A 2 
4 0.6563472 A 3 
5 0.5764883 A 4 
6 0.5224609 A 5 
7 0.8972208 B 0 
8 0.8456315 B 1 
9 0.7674353 B 2 
10 0.6689723 B 3 
11 0.6114414 B 4 
12 0.5381668 B 5 
13 0.8983253 C 0 
14 0.7878405 C 1 
15 0.6955420 C 2 
16 0.6179749 C 3 
17 0.5524141 C 4 
18 0.4966967 C 5  

据我所知，在传说中的排序因素是使用ggplot一个非常艰巨的任务，这就是为什么他们在按字母顺序排序的原因数据帧（factor w）。然而，真正的名称应该是不同的东西，如： “O”， “R” 和“N

的ggplot功能我尤斯是：

ggplot (data = eso3, aes (x=t, y = x, colour = w, linetype = w, shape= w)) 
    +geom_line() 
    +geom_point() 
    +scale_linetype_manual("LEGEND TITLE",values =c("solid","solid","dashed","dashed","dotted","dotted")) 
    +scale_colour_manual("LEGEND TITLE",values=c("black","black","darkgray","darkgray","dimgray","dimgray")) 
    +scale_shape_manual("LEGEND TITLE",values=c(19,15,19,15,19,15)) 
    +scale_y_continuous("Y LABEL",limits=c(0.0,1.0)) 
    +theme(axis.title.y = element_text(angle=0)) 
    +scale_fill_discrete("LEGEND TITLE",breaks=c("A","B","C"),labels=c("O","R","N")) 
    +ggtitle("MAIN TITLE") 
    +theme_bw()  

我知道功能scale_fill_discrete应该改变("A","B","C")到("O","R","N")。为什么它不工作？

Answer 1

由于您使用的colour，linetype和shape但不fill，你必须整合日Ë与scale_xxx_manual()调用新labeles，如：

ggplot (data = eso3, aes (x=t, y = x, colour = w, linetype = w, shape= w))+ 
geom_line()+ 
geom_point()+ 
scale_linetype_manual("LEGEND TITLE",values =c("solid","solid","dashed","dashed","dotted","dotted"),breaks=c("A", "B", "C"), labels=c("O","R","N"))+ 
scale_colour_manual("LEGEND TITLE",values=c("black","black","darkgray","darkgray","dimgray","dimgray"),breaks=c("A", "B", "C"), labels=c("O","R","N"))+ 
scale_shape_manual("LEGEND TITLE",values=c(19,15,19,15,19,15),breaks=c("A", "B", "C"), labels=c("O","R","N"))+ 
scale_y_continuous("Y LABEL",limits=c(0.0,1.0))+ 
theme(axis.title.y = element_text(angle=0))+ 
ggtitle("MAIN TITLE")+ 
theme_bw()