design: Extract design matrix
Description
Extract design matrix from data.frame and formula
Usage
design(formula, data, intercept = FALSE, rm_envir = FALSE, ...)
Value
An object of class 'design'
Arguments
- formula
formula
- data
data.frame
- intercept
If FALSE (default) an intercept is not included
- rm_envir
Remove environment
- ...
additional arguments (e.g, specials such weights, offsets,
subset)