rw_terms: Finds random walk terms in a formula object

In seabbs/epinowcast: Flexible Hierarchical Nowcasting

Finds random walk terms in a formula object

Description

This function extracts random walk terms denoted using rw() from a formula so that they can be processed on their own.

Usage

rw_terms(formula)

Arguments

formula

A model formula that may use standard fixed effects, random effects using lme4 syntax (see re()), and random walks defined using the rw() helper function.

Value

A character vector containing the random walk terms that have been identified in the supplied formula.

Reference

This function was adapted from code written by J Scott (under an MIT license) as part of the epidemia package (https://github.com/ImperialCollegeLondon/epidemia/).

See Also

Functions used to help convert formulas into model designs as_string_formula(), construct_re(), construct_rw(), enw_formula(), enw_manual_formula(), parse_formula(), re(), remove_rw_terms(), rw(), split_formula_to_terms()

Examples

epinowcast:::rw_terms(~ 1 + age_group + location)

epinowcast:::rw_terms(~ 1 + age_group + location + rw(week, location))

seabbs/epinowcast documentation built on Feb. 3, 2025, 9:56 p.m.