TraMineR (version 1.1)

seqdiff: Decompose the diffences between groups of sequences

Description

Decompose the difference between groups of sequences

Usage

seqdiff(seqdata, group, cmprange = c(0, 1), 
	seqdist_arg=list(method="LCS",norm=TRUE))

Arguments

seqdata

The sequence to analyse

group

The group variable

cmprange

The range used to compare subsequences

seqdist_arg

argument passed directly to seqdist as a list

Value

• A seqdiff object, with the following item:
• stat
  A data.frame with tree statistics, PseudoF, PseudoR2 and PseudoT for each timestamp of the sequence, see dissassoc
• variance
  A data.frame with the variance of each group defined by the group variable and for the whole population at each timestamp

Details

Analyse for each timestamp the pseudo-variance of a subsequence (defined by cmprange) explained by the group variable. The method compute a distance matrix, using seqdist for each timestamp and then apply dissassoc to compute the pseudo variance explained. There are print and plot method for the result returned.

See Also

dissassoc to analyse the association with the whole sequence

Examples

## Defining a state sequence object
data(mvad)
mvad.seq <- seqdef(mvad[, 17:86])

## Building dissimilarities
mvad.diff <- seqdiff(mvad.seq, group=mvad$gcse5eq)
print(mvad.diff)
plot(mvad.diff)
plot(mvad.diff, stat="Variance")