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Parse formula for brokenstick model

Source: R/internals.R
parse_formula.Rd

A bare bones formula parser to extract variables names from formulas of y ~ x | g. It return the name of the first variable mentioned in each formula component.

Usage

parse_formula(f)

Arguments

f

formula object

Value

A list with elements x, y and g. Each element has length 1.

Author

Stef van Buuren 2023