R Under development (unstable) (2023-11-28 r85645 ucrt) -- "Unsuffered Consequences"
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> library(cpr)
> 
> ################################################################################
> # test that matrix rank is as expected
> set.seed(42)
> mat <- matrix(rnorm(25000 * 120), nrow = 25000)
> stopifnot(identical(matrix_rank(mat), 120))
> 
> ################################################################################
> # test that matrix rank of a full rank bspline basis is as expected
> bmat <- bsplines(seq(0, 1, length = 100), df = 15)
> stopifnot(identical(matrix_rank(bmat), 15))
> 
> ################################################################################
> # test that matrix rank of a rank-deficient bspline basis
> bmat <- bsplines(seq(0, 1, length = 100), iknots = c(0.001, 0.002))
> stopifnot(identical(ncol(bmat), 6L))
> stopifnot(identical(matrix_rank(bmat), 5))
> 
> ################################################################################
> ##                                End of File                                 ##
> ################################################################################
> 
> proc.time()
   user  system elapsed 
   0.85    0.09    0.93