get_lmer_linfct: Return a matrix of linear contrasts, intended for use in...
In wfforrest/maeve: Modeling Accessories Enabling Visualization of Experiments

Description Usage Arguments Value Author(s) See Also Examples

Takes an lmerMod object from lme4::lmer() assuming a particular model formula type, then finds a contrast matrix to query the slope estimates. The most written is 'y ~ group + group:x + ( 1 + x | ID )'.

get_lmer_linfct(
  lmer_obj,
  contrast = c("Identity", "Dunnett", "Tukey", "Sequen", "custom"),
  grpnames = NULL,
  reference_Dunnett = NULL,
  slope_ind_char = ":x",
  custom_contrast = NULL
)

`lmer_obj`	an lmerMod object returned from lme4::lmer().
`contrast`	character string specifying which type of contrast is desired.
`grpnames`	character vector with names of levels for group factor.
`reference_Dunnett`	character string with exact match to an element of grpnames. The exact match will be the reference group in Dunnett contrasts.
`slope_ind_char`	character string indicating how to discern slope parameters from "names(fixef(lmer_obj))".
`custom_contrast`	numeric matrix of contrasts for slope estimates. Column names must match exact with treatment group names. If it is not NULL, it overrides whatever is specified in "contrast".