normalizeData {pcFactorStan}

Normalize data according to a canonical order

Description

Pairwise comparison data are not commutative. Alice beating Bob in chess is equivalent to Bob losing to Alice. normalizeData assigns an arbitrary order to all vertices and reorders vertices column-wise to match, flipping signs as needed.

Usage

normalizeData(df, ..., .palist = NULL, .sortRows = TRUE)

Arguments

df

a data frame with pairs of vertices given in columns pa1 and pa2, and item response data in other columns

...

Not used. Forces remaining arguments to be specified by name.

.palist

a character vector giving an order to use instead of the default

.sortRows

logical. Using the same order, sort rows in addition to vertex pairs.

Examples

df <- data.frame(pa1=NA, pa2=NA, i1=c(1, -1))
df[1,paste0('pa',1:2)] <- c('a','b')
df[2,paste0('pa',1:2)] <- c('b','a')
normalizeData(df)