1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/get_breaks.R
\name{get_breaks}
\alias{get_breaks}
\title{Easy Break Creation for Numeric Axes}
\usage{
get_breaks(n = NULL, by = NULL, from = NULL, to = NULL)
}
\arguments{
\item{n}{number of breaks.}
\item{by}{number: the step between breaks.}
\item{from}{the starting value of breaks. By default, 0 is used for positive
variables}
\item{to}{the end values of breaks. This corresponds generally to the maximum
limit of the axis.}
}
\value{
a break function
}
\description{
Creates breaks for numeric axes to be used in the functions
\code{\link[ggplot2:scale_continuous]{scale_x_continuous}()} and
\code{\link[ggplot2:scale_continuous]{scale_y_continuous}()}. Can be used to increase the
number of x and y ticks by specifying the option \code{n}. It's also
possible to control axis breaks by specifying a step between ticks. For
example, if \code{by = 5}, a tick mark is shown on every 5.
}
\examples{
# 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)
)
}
|
