Placement of axis labels at minor breaks with ggplot2

Question

I am using ggplot2 to do some plotting of genomic data, so the basic format is that there is a chromosome and a position along it. I convert the positions to be on a contin

Answer 1

How about this?

breaks <- c(0, cumsum(chromosome_length))
scale_x_continuous("Genome Position", breaks = breaks + 0.5, labels = breaks)