Evaluates code_by, then applies the appropriate use_contrasts method
Usage
# S3 method for class 'AsIs'
use_contrasts(
factor_col,
code_by = NA,
reference_level = NA,
set_intercept = NA,
drop_trends = NA,
labels = NULL,
as_is = FALSE,
...
)Arguments
- factor_col
A factor vector, eg from df$factorVarName
- code_by
A symbol to be evaluated
- reference_level
The level to use as the reference level, default NA
- set_intercept
The intercept to use, default NA
- drop_trends
The trends to drop, default NA
- labels
A vector of labels to apply to the matrix column names, default NULL (no new labels)
- as_is
Logical, default FALSE, whether to leave the resulting matrix as-is
- ...
Additional arguments to be passed on
Examples
use_contrasts(gl(5,1), I(scaled_sum_code))
#> 2 3 4 5
#> 1 -0.2 -0.2 -0.2 -0.2
#> 2 0.8 -0.2 -0.2 -0.2
#> 3 -0.2 0.8 -0.2 -0.2
#> 4 -0.2 -0.2 0.8 -0.2
#> 5 -0.2 -0.2 -0.2 0.8