extracat

extracat is an R package for working with categorical variables.

Installation

The package extracat has been archived from CRAN, but you can install it from this github repository:

devtools::install_github("heike/extracat")

Simple use case

Several data sets are provided within the package, the command visna provides a good first overview of the where missing values are in a data set:

library(extracat)
visna(GeneEx)

Using additional sorting methods, we can work out patterns of missing values:

# reorder both rows and columns:
visna(GeneEx, sort = "b", sort.method="optile")