If you are adding argument labels=
to scale_fill_gradient()
then you should also add argument breaks=
that is the same length as your labels.
+ scale_fill_gradient(high = "springgreen4", low= "grey90", name="Sum",
labels = c("5,000,000", "4,000,000", "3,000,000", "2,000,000", "1,000,000"),
breaks = c(5000000, 4000000, 3000000, 2000000, 1000000))
In this case a better solution would be to just use the dollar
format from the scales
library. That will automatically add dollar signs and commas to the labels.
library(scales)
+ scale_fill_gradient(labels=dollar)