Creates breaks for numeric axes to be used in the functions
scale_x_continuous() and
scale_y_continuous(). Can be used to increase the
number of x and y ticks by specifying the option n. It's also
possible to control axis breaks by specifying a step between ticks. For
example, if by = 5, a tick mark is shown on every 5.
get_breaks(n = NULL, by = NULL, from = NULL, to = NULL)Arguments
- n
number of breaks.
- by
number: the step between breaks.
- from
the starting value of breaks. By default, 0 is used for positive variables
- to
the end values of breaks. This corresponds generally to the maximum limit of the axis.
Value
a break function
Examples
# Generate 5 breaks for a variable x
get_breaks(n = 5)(x = 1:100)
#> [1] 0 25 50 75 100
# Generate breaks using an increasing step
get_breaks(by = 10)(x = 1:100)
#> [1] 0 10 20 30 40 50 60 70 80 90 100
# Combine with ggplot scale_xx functions
library(ggplot2)
# Create a basic plot
p <- ggscatter(mtcars, x = "wt", y = "mpg")
p
# Increase the number of ticks
p +
scale_x_continuous(breaks = get_breaks(n = 10)) +
scale_y_continuous(breaks = get_breaks(n = 10))
# Set ticks according to a specific step, starting from 0
p + scale_x_continuous(
breaks = get_breaks(by = 1.5, from = 0),
limits = c(0, 6)
) +
scale_y_continuous(
breaks = get_breaks(by = 10, from = 0),
limits = c(0, 40)
)
