ggplot2 scale x date?

Question

I would like to make the ticks in the following graph daily instead of every 2 days.

df1 <- structure(
  list(
    Timestamp = structure(
      c(
                


        

Answer 1

You can use the scales package. It looks like you need to use the function date_breaks, rather than just breaks to get proper labels:

EDIT: it appears the argument has been changed to date_breaks:

library(scales)
library(ggplot2)
ggplot(df1, aes(x = Timestamp, y = number)) +
    geom_line(size=2) +
    geom_point(size=5) + 
    scale_y_continuous(breaks = seq(0, 50, by = 2)) + 
    scale_x_datetime(date_breaks = "1 day")

original:

library(scales)
library(ggplot2)
ggplot(df1, aes(x = Timestamp, y = number)) +
    geom_line(size=2) +
    geom_point(size=5) + 
    scale_y_continuous(breaks = seq(0, 50, by = 2)) + 
    scale_x_datetime(breaks = date_breaks("1 day"))

If you want to change how the date is displayed in the label, you can use date_format inside the scale_x_datetime call.