How to Change Legend Labels and Colors in ggplot2

I'd like to change the label in the legend in Rggplot2scale_fill_discrete

We were able to change the legend label by referring to the page above.
In addition to this, how do I perform color specification?

library(ggplot2)
legend.labels<-c("hoge", "fuga", "piyo")

ggplot(iris,aes(Sepal.Length,Petal.Length))+
geom_line(aes(color=Species))+
scale_color_discrete(labels=legend.labels)+
scale_color_manual(values=c("red", "blue", "orange"))

In this script,

Scale for 'colour' is already present. Adding another scale for 'colour',
which will replace the existing scale.

The error message is returned and the color specification is applied, but
Legend labels do not apply.

What code should I use to change the legend label after specifying the color?
I look forward to your kind cooperation.

r tidyverse ggplot2

2022-09-30 17:40

1 Answers

You can add labels to the scale_color_manual() argument.

iris%>% 
 ggplot(aes(x=Sepal.Length, 
            y=Petal.Length, color=Species))+
 geom_line()+ 
 scale_color_manual(values=c('red','blue','orange'),
                    labels=c("hoge", "fuga", "piyo"))

2022-09-30 17:40

If you have any answers or tips

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