pretty_range {ggeffects}

Create a pretty sequence over a range of a vector

Description

Creates an evenly spaced, pretty sequence of numbers for a range of a vector.

Usage

pretty_range(x, n = NULL, length = NULL)

Arguments

x

A numeric vector.

n

Numeric value, indicating the size of how many values are used to create a pretty sequence. If x has a large value range (> 100), n could be something between 1 to 5. If x has a rather small amount of unique values, n could be something between 10 to 20. If n = NULL, pretty_range() automatically tries to find a pretty sequence.

length

Integer value, as alternative to n, defines the number of intervals to be returned.

Value

A numeric vector with a range corresponding to the minimum and maximum values of x. If x is missing, a function, pre-programmed with n and length is returned. See examples.

Examples

data(iris)
# pretty range for vectors with decimal points
pretty_range(iris$Petal.Length)

# pretty range for large range, increasing by 50
pretty_range(1:1000)

# increasing by 20
pretty_range(1:1000, n = 7)

# return 10 intervals
pretty_range(1:1000, length = 10)

# same result
pretty_range(1:1000, n = 2.5)

# function factory
range_n_5 <- pretty_range(n = 5)
range_n_5(1:1000)