Easy Break Creation for Numeric Axes
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)
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. |
a break function
# Generate 5 breaks for a variable x get_breaks(n = 5)(x = 1:100) # Generate breaks using an increasing step get_breaks(by = 10)(x = 1:100) # 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) )
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