dvmisc (version 1.1.4)

interval_groups: Split Continuous Variable into Equal-Width Groups

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

# NOT RUN {
# 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))

# }