TraMineR (version 2.2-9)

seqpm: Find substring patterns in sequences

Description

Search for a pattern (substring) into sequences.

Usage

seqpm(seqdata, pattern, sep="")

Value

a list with two elements (see details).

Arguments

seqdata

a sequence object as defined by the seqdef function.

pattern

a character string representing the pattern (substring) to search for.

sep

state separator used in the pattern definition.

Author

Alexis Gabadinho

Details

This function searches a pattern (a character string) into a set of sequences and returns the results as a list with two elements: 'Nbmatch' the number of occurrences of the pattern and 'MatchesIndex' the vector of indexes (row numbers) of the sequences that match the pattern (see examples below).

Examples

data(actcal)
actcal.seq <- seqdef(actcal,13:24)

## search for pattern "DAAD"
## (no work-full time work-full time work-no work)
## results are stored in the 'daad' object
daad <- seqpm(actcal.seq,"DAAD")

## Looking at the sequences
## containing the pattern
actcal.seq[daad$MIndex,]

## search for pattern "AD"
## (full time work-no work)
seqpm(actcal.seq,"AD")