Degrees of freedom for a contrast

Degrees of freedom for a contrast

Usage

df_for_contrast(
  fit,
  L,
  method = c("auto", "satterthwaite", "kenward_roger", "bootstrap", "asymptotic", "none"),
  ...
)

# S3 method for class 'mm_lmm'
df_for_contrast(
  fit,
  L,
  method = c("auto", "satterthwaite", "kenward_roger", "bootstrap", "asymptotic", "none"),
  ...
)

Arguments

fit

A fitted mm_lmm.

L

A contrast vector or matrix.

method

Requested degrees-of-freedom method.

...

Reserved for future methods.

Value

An mm_df_for_contrast object with $table (one row per contrast: contrast, df, method, requested_method, reason), $df (the named numeric vector), and $method. When the method is "none" or the engine refuses, df is NA and reason records why.