lmerTest: is_estimable – R documentation

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is_estimable

Estimability of Contrasts

Description

Computes the estimability of a vector or matrix of contrasts (i.e. linear functions of the coefficients) from the nullspace of a design matrix or potentially directly from the design matrix.

Usage

is_estimable(
  contrast,
  nullspace = NULL,
  X = NULL,
  tol = sqrt(.Machine$double.eps)
)

Arguments

`contrast`	a numeric matrix where each row is a contrast vector for which estimability is computed. The matrix should have as many columns as there are columns in the design matrix (which equals the number of coefficients). If `contrast` is a vector it is coerced to a matrix.
`nullspace`	the nullspace of the design matrix.
`X`	design matrix.
`tol`	tolerance for determining if a contrast is orthogonal to the

Value

a logical vector of length nrow(contrast) determining if each contrast is estimable

Author(s)

Rune Haubo B. Christensen

Examples

# FIXME: We need some examples here

lmerTest

Tests in Linear Mixed Effects Models

v3.1-3

GPL (>= 2)

Authors

Alexandra Kuznetsova [aut], Per Bruun Brockhoff [aut, ths], Rune Haubo Bojesen Christensen [aut, cre], Sofie Pødenphant Jensen [ctb]

Initial release