R Under development (unstable) (2024-09-06 r87103 ucrt) -- "Unsuffered Consequences"
Copyright (C) 2024 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(pcalg)
> 
> m <- matrix(FALSE, 3,3)
> tmp <- list(NULL, NULL, NULL)
> 
> (pag0 <- udag2pag(m, sepset = rep(tmp, 3)))
     [,1] [,2] [,3]
[1,]    0    0    0
[2,]    0    0    0
[3,]    0    0    0
> stopifnot(is.numeric(pag0))
> 
> 
> proc.time()
   user  system elapsed 
   0.81    0.07    0.87