R Under development (unstable) (2024-09-06 r87103 ucrt) -- "Unsuffered Consequences"
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> library(pcalg)
> suppressWarnings(RNGversion("3.5.0"))
> 
> set.seed(123)
> myDAG <- randomDAG(20, 0.3)
> mcov <- trueCov(myDAG)
> amat <- t(as(myDAG,"matrix"))
> amat[which(amat!=0)] <- 1
> graphEst <- dag2cpdag(myDAG)
> ## plot(graphEst)
> amat.cpdag <- t(as(graphEst,"matrix"))
> 
> stopifnot(sort(optAdjSet(amat,2,6))==c())
> 
> 
> stopifnot(pcalg:::isAmenable(amat.cpdag,5,16,type="cpdag"))
> stopifnot(sort(optAdjSet(amat.cpdag,5,16))==c(1,2,3,4,6,7,8,11,13))
> stopifnot(optAdjSet(amat.cpdag,5,16)==optAdjSet(amat,5,16))
> 
> stopifnot(pcalg:::isAmenable(amat.cpdag,2,12,type="cpdag"))
> stopifnot(sort(optAdjSet(amat.cpdag,2,12))==c(5,7))
> stopifnot(optAdjSet(amat.cpdag,2,12)==optAdjSet(amat,2,12))
> 
> stopifnot(optAdjSet(amat.cpdag,2,c(3,7,12))==optAdjSet(amat,2,12))


Not all nodes in Y are descendants of the nodes in X 
The algorithm will continue with the pruned Y= 12 .
>           
> 
> proc.time()
   user  system elapsed 
   1.12    0.17    1.29