I can't seem to be able to set different fill colours for geom_ribbon()
, using one of the columns as input to fill
library(ggplot2)
time <- as.factor(c('A','B','C','D'))
grouping <- as.factor(c('GROUP1','GROUP1','GROUP1','GROUP1',
'GROUP2','GROUP2','GROUP2','GROUP2'))
x <- c(1.00,1.03,1.03,1.06,0.5,0.43,0.2,0.1)
x.upper <- x 0.05
x.lower <- x-0.05
df <- data.frame(time, x, x.upper, x.lower,grouping)
ggplot(data = df,aes(as.numeric(time),x,group=grouping,color=grouping))
geom_ribbon(data = df, aes(x=as.numeric(time), ymax=x.upper, ymin=x.lower),
fill=grouping, alpha=.5)
geom_point() labs(title="My ribbon plot",x="Time",y="Value")
scale_x_continuous(breaks = 1:4, labels = levels(df$time))
I get the error Error: Unknown colour name: grouping
but fill=c("pink","blue")
works fine. I don't want to specify the colours manually.
All other examples I can find simply list the column in the fill
argument so I'm not sure what I'm doing incorrectly.
CodePudding user response:
Move fill = grouping
inside aes
so that this column is mapped to the fill variable.
ggplot(data = df, aes(as.numeric(time), x, color = grouping))
geom_ribbon(data = df, aes(ymax = x.upper, ymin = x.lower,
fill = grouping), alpha = 0.5)
geom_point()
labs(title = "My ribbon plot", x = "Time", y = "Value")
scale_x_continuous(breaks = 1:4, labels = levels(df$time))