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TraMineR (version 2.2-10)

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

Run this code
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")

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