# seqtabstocc: Frequencies of state co-occurrence patterns In TraMineRextras: TraMineR Extension

## Description

Computes the frequencies of co-occurring state patterns.

## Usage

 `1` ``` seqtabstocc(seqdata, with.missing=FALSE, ...) ```

## Arguments

 `seqdata` A state sequence (`stslist`) object as returned by `seqdef`. `with.missing` Logical. Should the missing state be considered as a regular state? `...` Additional arguments to be passed to `seqtab`.

## Details

The function extracts the list of states co-occurring in each sequence. For each sequence, the co-occurring states are extracted as the sequence of the alphabetically sorted distinct states. The frequencies of the extracted sets of states is then obtained by means of the TraMineR `seqtab` function.

Returned patterns with a single state correspond to sequences that contain only that state.

## Value

A `stslist.freq` object with co-occurrence patterns sorted in descending frequency order.

## Author(s)

Gilbert Ritschard

`seqtab`
 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18``` ```## Creating a sequence object from the first 500 actcal data. data(actcal) actcal.seq <- seqdef(actcal[1:500,13:24]) ## 10 most frequent state patterns in the data seqtabstocc(actcal.seq) ## All state patterns seqtabstocc(actcal.seq, idxs=0) ## Example with missing states data(ex1) ## adding 3 sequences with no gap and left missing state ex1 <- rbind(ex1,c(rep("A",4),rep(NA,9))) ex1 <- rbind(ex1,c(rep("A",4),rep(NA,9))) ex1 <- rbind(ex1,rep("A",13)) s.ex1 <- seqdef(ex1[,1:13]) seqtabstocc(s.ex1, with.missing=TRUE) ```