Biograph (version 1.0)

Sequences: List of sequences

Description

Produces a frequency table of the sequences recorded in the data

Usage

Sequences(survey)

Arguments

survey

Input data

Value

• sequences: the frequency table of sequences

Details

The sequences are determined from the path variable in the data

Examples

#	Example 1: Sequences in GLHS
	data(GLHS)
	z <- Parameters (GLHS)
	seq <- Sequences (GLHS)
	
#	Example 2: Sequences in NLOG98
	data(NLOG98)
	z <- Parameters (NLOG98)
	seq <- Sequences (NLOG98)
	
#	Example 3: Sequence in NLOG98, by birth cohort
	table(NLOG98$cohort)   # cohort size
	seq.1 <- Sequences(NLOG98[NLOG98$cohort=="<1960",])
	seq.2 <- Sequences(NLOG98[NLOG98$cohort==">=1960",])
	# Note that the sum(seq.2$ncase) equals size of second cohort