DataArrays.jl

This package provides functionality for working with missing data in Julia. In particular, it provides the following:

• NA: A singleton representing a missing value

• DataArray{T}: An array type that can house both values of type T and missing values

• PooledDataArray{T}: An array type akin to DataArray but optimized for arrays with a smaller set of unique values, as commonly occurs with categorical data

Installation

To install the package, run Pkg.add("DataArrays") from the Julia REPL, then run using DataArrays to load it.

Contents

• Representing missing data
• Arrays with possibly missing data
• Pooled arrays
• Utility functions