| is.fullrank {limma} | R Documentation |
Test whether a numeric matrix has full column rank.
is.fullrank(x) nonEstimable(x)
x |
a numeric matrix or vector |
is.fullrank is used to check the integrity of design matrices in limma, for example after subsetting operations.
nonEstimable is used by lmFit to report which coefficients in a linear model cannot be estimated.
is.fullrank returns TRUE or FALSE.
nonEstimable returns a character vector of names for the columns of x which are linearly dependent on previous columns.
If x has full column rank, then the value is NULL.
Gordon Smyth
# TRUE is.fullrank(1) is.fullrank(cbind(1,0:1)) # FALSE is.fullrank(0) is.fullrank(matrix(1,2,2)) nonEstimable(matrix(1,2,2))