combine_formulas {SSBtools} | R Documentation |
Combine formulas
Description
Combining formulas by +
or another operator.
This is particularly useful for linking tables in the case of table building with formulas.
Usage
combine_formulas(lof, operator = "+", simplify = FALSE, env = parent.frame())
Arguments
lof |
list or vector of formulas to be linked |
operator |
|
simplify |
logical value, default 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(s)
Daniel Lupp and Øyvind Langsrud
Examples
lof1 <- c(~a+b, ~a:c, ~c*d)
combine_formulas(lof1)
combine_formulas(lof1, operator = "*")
combine_formulas(lof1, simplify = TRUE)
# Intercept is included when needed
lof2 <- c(~a+b -1, ~a:c -1, ~c*d)
combine_formulas(lof2)
combine_formulas(lof2, simplify = TRUE)
combine_formulas(lof2[1:2])
combine_formulas(lof2[1:2], simplify = TRUE)
[Package SSBtools version 1.8.0 Index]