CODEWITHSUNDEEP
rggplot2
Ben
Ben

Reputation: 21625

How do I format my labels using a log scale in ggplot

I'm having trouble formatting my y-axis labels the way I want. I'd like them to be rounded to the nearest thousand.

library(scales)
library(ggplot2)

df<-data.frame(x=seq(1,10,by=1),y=sample(10000000,10))
ggplot(df,aes(x=x,y=y))+geom_point()+scale_y_continuous(trans='log10', breaks=trans_breaks('log10', function(x) 10^x), labels=comma)

enter image description here

How do I format my y labels so that they are rounded to the nearest thousand? In other words, I'd like 7,943,000 displayed instead of 7,943,282.

Upvotes: 2

Views: 2322

Answers (1)

Ram Narasimhan
Ram Narasimhan

Reputation: 22496

You can do that by changing the labels argument to scale_y_continuous. Here I used round(x,-3) to round the label value to the nearest 1000:

library(ggplot2)
library(scales)
df<-data.frame(x=seq(1,10,by=1),y=sample(10000000,10))
p <- ggplot(df,aes(x=x,y=y))+geom_point()
p <- p +scale_y_continuous(trans='log10', 
                           breaks=trans_breaks('log10', function(x) 10^x), 
                           labels = function(x)round(x,-3)
                           )
p

Which produces: enter image description here

Upvotes: 2

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