interval_groups: Split Continuous Variable into Equal-Width Groups

In vandomed/dvmisc: Convenience Functions, Moving Window Statistics, and Graphics

Description

Splits a continuous variable into equal-width groups. Useful for assessing linearity in regression models.

Usage

interval_groups(x, groups = 5, ...)

Arguments

x	Numeric vector.
groups	Numeric value specifying number of groups to create.
...	Arguments to pass to cut.

Value

Factor variable.

See Also

cut

Examples

# Convert values from N(0, 1) into 6 equal-width groups
x <- rnorm(1000)
groups <- interval_groups(x, 6)
table(groups)

# Use interval_groups to detect non-linearity
set.seed(123)
x <- rnorm(1000)
y <- 1.5 + 1.25 * x + 0.25 * x^2 + rnorm(1000)
plot(tapply(y, interval_groups(x), mean))

vandomed/dvmisc documentation built on Oct. 2, 2020, 9:50 p.m.