Replace variables in formula with sum of other variables — substitute_formula_vars • SSBtools

Replace variables in formula with sum of other variables

Usage

substitute_formula_vars(
  f,
  replacements,
  simplify = FALSE,
  env = parent.frame()
)

Arguments

f: A model formula.
replacements: A named list. The names of replacements must correspond to variables in f. Each element in replacements must be a character vector consisting of the variables you wish to replace.
simplify: Logical, default is FALSE. Determines whether the formula should be expanded and simplified before output or not.
env: The environment for the output formula.

Value

model formula

Author

Daniel Lupp and Øyvind Langsrud

Examples

f <- ~b + a*c  + b:d
substitute_formula_vars(f, list(a = c("hello", "world", "b"), 
                                b = c("Q1", "Q2")))
#> ~(Q1 + Q2) + (hello + world + b) * c + (Q1 + Q2):d
#> <environment: 0x55824ab96af0>