algstat (version 0.0.2)

teshape: Interconvert data structures

Description

Interconvert an array, a raw data frame, and frequency distribution data.frame.

Usage

teshape(data, out = c("freq", "tab", "raw"))

Arguments

data

a data frame or array

out

the output format, see examples

Value

a matrix containing the Markov basis as its columns (for easy addition to tables)

Details

Multivariate categorical data can be represented in several ways. Three comon ways are : a contingency table, a data frame of raw observations (1 row = 1 subject), and a long data frame with a variable containing the counts in the contingency table.

Examples

data(Titanic)

# array to others
teshape(Titanic, "freq")
teshape(Titanic, "tab") # what it was
teshape(Titanic, "raw")


# freq to others
TitanicFreq <- teshape(Titanic, "freq")
teshape(TitanicFreq, "freq") # what it was
teshape(TitanicFreq, "tab")  # == Titanic
teshape(TitanicFreq, "raw")

# raw to others
TitanicRaw <- teshape(Titanic, "raw")
teshape(TitanicRaw, "freq")
teshape(TitanicRaw, "tab")
teshape(TitanicRaw, "raw")

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