CODEWITHSUNDEEP
rggplot2
user5363938
user5363938

Reputation: 841

Using color-filled circles for ggplot legends

I have the following code

TRP_C<-100/(100+650)
FPR_C<-200/(200+650)
C<-data.frame(TPR=TRP_C,FPR=FPR_C)

TRP_D<-120/(120+30)
FPR_D<-350/(350+500)
D<-data.frame(TPR=TRP_D,FPR=FPR_D)


ggplot(NULL, aes(x=FPR, y=TPR)) +
    geom_point(data=C,shape=1,aes(fill="A"),size=4,color="red")+
    geom_point(data=D,shape=1,aes(fill="B"),size=4,color="green")

The problem is it gives me a ggplot which the points are not clear on it at all. I think, if i can make the points filled then it would be more clear in the diagram.

So, how can i make the legend ,and points filled?

Upvotes: 1

Views: 1824

Answers (1)

Miha
Miha

Reputation: 2884

Use shape (insert value from 21-25) inside geom_point() and scale_fill_manual for colors.

So your code looks like this

ggplot(NULL, aes(x=FPR, y=TPR)) + 
  geom_point(data=C,shape=21,aes(fill="A"),size=4) +
  geom_point(data=D,shape=21,aes(fill="B"),size=4) +
  scale_fill_manual(values=c("red", "green"))

And output

enter image description here

Upvotes: 2

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