TraMineR (version 1.1)

seqetm: Creating event transition matrix

Description

This function automatically create an event transition matrix to transform state sequences data in TSE format (transitions).

Usage

seqetm(seq, method = "transition", use.labels = TRUE, 
  sep = ">", bp = "", ep = "end")

Arguments

seq

The state sequence to create transitions from

method

The method to use. Actually, "transition","state" and "period" are available.

use.labels

If true, transitions names are build from sequence labels instead of sequence alphabet.

sep

Separator to use between period in "transition" method.

bp

Prefix to signal begining of a period

ep

Prefix to signal end of a period

Value

• The event matrix.

Details

Three methods are implemented and can be set through the method parameter: 'transition' automaticaly generates a distinct event for each transition and the begining of the sequence; 'state' generates one event per state, in order to analyse state sequence using event sequences methods; 'period' automaticaly generates two events for each transition: one for the end of the previous period, and the other one for the beginning of the new period.

See Also

See Also seqformat for conversion to TSE format and seqecreate for handling transition data.

Examples

## Creating a sequence object with the columns 13 to 24
## in the 'actcal' example data set
data(actcal)
actcal.seq <- seqdef(actcal,13:24,
        labels=c("FullTime", "PartTime", "LowPartTime", "NoWork"))
## Creating a transition matrix, one event per transition
seqetm(actcal.seq,method = "transition")

## Creating a transition matrix, two events per transition
seqetm(actcal.seq,method = "state")

## Creating a transition matrix, two events per transition
seqetm(actcal.seq,method = "period")

## Creating a transition matrix, considering the begining
## as a special event, two events per transition
seqetm(actcal.seq,method = "period", bp="begin")