Create a Blank COPE / Contrast Matrix from a Model or Predictor Names

Create a Blank COPE / Contrast Matrix from a Model or Predictor Names

Usage

gen_contrast_blank(model, contrasts = 1)

Arguments

model

A fitted model object (lm, glm, lmer, lmerTest, etc.) OR a character vector of parameter names.

contrasts

Number of rows (integer), character vector of row names, or NULL/FALSE for no row names. Default is 1 (numeric, so no row names).

Value

A numeric matrix filled with zeros matching the model's fixed-effect parameters.

See also

Other contrast or COPE helpers: check_contrast_orthogonality(), gen_contrast_ss(), gen_data_jn(), plot.jn_df(), tidy_es_cope_F(), tidy_es_cope_t()

Examples

fit <- lm(salary ~ rank + yrs.since.phd, data = carData::Salaries)
gen_contrast_blank(fit, contrasts = 2)
#>      (Intercept) rankAssocProf rankProf yrs.since.phd
#> [1,]           0             0        0             0
#> [2,]           0             0        0             0
gen_contrast_blank(fit, contrasts = c("ContrastA", "ContrastB"))
#>           (Intercept) rankAssocProf rankProf yrs.since.phd
#> ContrastA           0             0        0             0
#> ContrastB           0             0        0             0