change axis scaling step size in ggplot2

Question

i have an R script which generate a geom_tile plot exactly as i want.

but the problem is that the axis step size is so big e.g(4000 - 8000 - 12000 - ...)

i tried scale_x_continuous('Xaxis',limits = c(...)) and scale_x_continuous(breaks=1:10)

but it only make limits to the data.

what should i do to minimize this step size on the axis?

e.g (500 - 1000 - 1500 - 2000 - 2500 ....etc)

thankk you

Answer 1

Since no one has posted an answer yet, only comments, here it is :)

scale_x_continuous(breaks = seq(0, 10000, 500))

Source: http://docs.ggplot2.org/current/scale_continuous.html