R Under development (unstable) (2025-11-24 r89059 ucrt) -- "Unsuffered Consequences"
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> 
> ### ceeboo 2014
> 
> 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

> 
> ##
> z <- list(a = c("A","B"), b = c("D"), c = c("A","H"))
> z <- as(z, "tidLists")
> summary(z)
tidLists in sparse format with
 3 items/itemsets (rows) and
 4 transactions (columns)

most frequent transactions:
      1       3       2 (Other) 
      2       2       1       0 

item frequency distribution:
sizes
1 2 
1 2 

   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
  1.000   1.500   2.000   1.667   2.000   2.000 

includes extended item information - examples:
  labels
1      a
2      b
3      c
> transactionInfo(z)
  labels
1      A
2      B
3      D
4      H
> 
> ###
> 
> proc.time()
   user  system elapsed 
   1.14    0.10    1.25