lmerTest: ensure_full_rank – R documentation

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ensure_full_rank

Ensure a Design Matrix has Full (Column) Rank

Determine and drop redundant columns using the qr decomposition.

ensure_full_rank(X, tol = 1e-07, silent = FALSE, test.ans = FALSE)

`X`	a design matrix as produced by `model.matrix`.
`tol`	`qr` tolerance.
`silent`	throw message if columns are dropped from `X`? Default is `FALSE`.
`test.ans`	Test if the resulting/returned matrix has full rank? Default is `FALSE`.

A design matrix in which redundant columns are dropped

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