CODEWITHSUNDEEP
rggplot2
nouse
nouse

Reputation: 3471

geom_line connects dots on the wrong axis

Consider

data <- data.frame(A=runif(10), B=runif(10), Height=c(1:10))
library(reshape)
melted <- melt(data, id.vars="Height")
library(ggplot2)

ggplot(melted, aes(value, Height)) +
  geom_point()+
  scale_y_reverse(breaks=c(1:10)) +
  facet_wrap(~variable,scale="free_x")+
  geom_line(aes(group=variable))

geom_line is connecting the dots along the x-axis, but i would like it to connect the dots on the y-scale, to show the Height profile of my data. I was trying coord_flip() and exchange the aes(x,y) arguments, but that doesnt work with the scale argument in facet_wrap.

Side question: In

scale_y_reverse(breaks=c(1:10)) +

i cannot exchange c(1:10) with Height, as the object is not found. This is odd, as it worked in my real life data.

Upvotes: 3

Views: 3208

Answers (1)

sebastian-c
sebastian-c

Reputation: 15425

geom_line joins lines up from the minimum x to maximum. In order to get the lines drawn in a different order, you need to use geom_path.

ggplot(melted, aes(value, Height)) +
  geom_point()+
  scale_y_reverse(breaks=c(1:10)) +
  facet_wrap(~variable,scale="free_x")+
  geom_path(aes(group=variable))

Pretty plot

Upvotes: 2

Related Questions