R Under development (unstable) (2025-11-24 r89059 ucrt) -- "Unsuffered Consequences"
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> 
> ### ported from arules 1.7-7
> 
> library("arulesSequences")
Loading required package: arules
Loading required package: Matrix

Attaching package: 'arules'

The following objects are masked from 'package:base':

    abbreviate, write


Attaching package: 'arulesSequences'

The following object is masked from 'package:arules':

    itemsets

> 
> e <- new("ngCMatrix")
> x <- new("ngCMatrix", p   = as.integer(c(0,3,5,7,7,10)),
+                       i   = as.integer(c(1,2,4,1,2,0,4,0,2,5)),
+                       Dim = as.integer(c(6,5)))
> rownames(x) <- paste("I", 1:6, sep = "")
> colnames(x) <- paste("T", 1:5, sep = "")
> #x
> 
> ##
> #unclass(x)
> 
> ## validity
> stopifnot(getValidity(getClassDef("CsparseMatrix"))(x))
> .Call(arulesSequences:::R_valid_ngCMatrix, x)
[1] TRUE
> .Call(arulesSequences:::R_valid_ngCMatrix, e)
[1] TRUE
> 
> ## t
> identical(.Call(arulesSequences:::R_transpose_ngCMatrix, x), t(x))
[1] TRUE
> identical(.Call(arulesSequences:::R_transpose_ngCMatrix, e), t(e))
[1] TRUE
> 
> ## column/row subset (index can only be integer now)
> s <- as.integer(c(1,1,3,4))
> stopifnot(all.equal(x[,s], .Call(arulesSequences:::R_colSubset_ngCMatrix, x, s)))
> 
> #
> stopifnot(identical(.Call(arulesSequences:::R_colSubset_ngCMatrix, e, integer()), e))
> stopifnot(all.equal(x[s,], .Call(arulesSequences:::R_rowSubset_ngCMatrix, x, s)))
> 
> #
> stopifnot(identical(.Call(arulesSequences:::R_rowSubset_ngCMatrix, e, integer()), e))
> 
> ## reorder
> stopifnot(all.equal(.Call(arulesSequences:::R_recode_ngCMatrix, x, 6:1), x[6:1,]))
> stopifnot(all.equal(.Call(arulesSequences:::R_recode_ngCMatrix, e, integer()), e))
> 
> ## recode (add columns)
> stopifnot(identical(.Call(arulesSequences:::R_recode_ngCMatrix, x, c(1L,3:7)),
+   as(rbind(x[1,,drop=FALSE], 
+     Matrix(0, ncol = 5, sparse = TRUE), 
+     x[2:6,, drop = FALSE]), "nsparseMatrix")))
> 
> ## cbind
> stopifnot(identical(.Call(arulesSequences:::R_cbind_ngCMatrix, e, e), cbind(e,e)))
> stopifnot(identical(.Call(arulesSequences:::R_cbind_ngCMatrix, x, x), cbind(x, x)))
> 
> ## logical OR
> identical(.Call(arulesSequences:::R_or_ngCMatrix, x, x), 
+   as(x | x, "nsparseMatrix"))
[1] TRUE
> identical(.Call(arulesSequences:::R_or_ngCMatrix, e, e), 
+   as(e | e, "nsparseMatrix"))
[1] TRUE
> 
> ## row sums
> stopifnot(all.equal(.Call(arulesSequences:::R_rowSums_ngCMatrix, x), rowSums(x)))
> stopifnot(all.equal(.Call(arulesSequences:::R_rowSums_ngCMatrix, e), rowSums(e)))
> 
> ## column sums
> stopifnot(all.equal(colSums(x), .Call(arulesSequences:::R_colSums_ngCMatrix, x)))
> stopifnot(all.equal(.Call(arulesSequences:::R_colSums_ngCMatrix, e), colSums(e)))
> 
> ## crossprod and tcrossprod
> all.equal(.Call(arulesSequences:::R_crosstab_ngCMatrix, x, NULL, TRUE),
+   as(tcrossprod(as(as(x, "ngCMatrix"), "dsparseMatrix")), "matrix"))
[1] TRUE
> all.equal(.Call(arulesSequences:::R_crosstab_ngCMatrix, x, NULL, FALSE),
+   as(crossprod(as(as(x, "ngCMatrix"), "dsparseMatrix")), "matrix"))
[1] TRUE
> 
> ###
> 
> 
> proc.time()
   user  system elapsed 
   1.09    0.14    1.21