TraMineRextras (version 0.6.7)

seqentrans: Event sequence length and number of events

Description

Adds the sequence length (number of transitions) and total number of events of event sequences to the data attribute of a subseqelist event sequence object.

Usage

seqentrans(fsubseq, avg.occ = FALSE)

Value

The object fsubseq updated with the additional information.

Author

Nicolas Müller and Gilbert Ritschard

Arguments

fsubseq

A subseqelist object as returned by seqefsub.

avg.occ

Logical: Should a column with average number of occurrences also be added?

Details

An event sequence object is an ordered list of transitions, with each transition a non-ordered list of events occurring at a same position.

Average occurrences by sequence may be useful when counts report number of occurrences rather than number of sequences containing the subsequence.

Examples

data(actcal.tse)
actcal.seqe <- seqecreate(actcal.tse[1:500,])

##Searching for frequent subsequences appearing at least 10 times
fsubseq <- seqefsub(actcal.seqe, min.support=10)
fsubseq <- seqentrans(fsubseq)
## dispaying only those with at least 3 transitions
fsubseq[fsubseq$data$ntrans>2]
## dispaying only those with at least 3 events
fsubseq[fsubseq$data$nevent>2]

## Average occurrences when counting distinct occurrences
ct <- seqeconstraint(count.method="CDIST_O")
fsb <- seqefsub(actcal.seqe, min.support=10, constraint=ct)
fsb <- seqentrans(fsb, avg.occ=TRUE)
fsb[1:10,]