Library for working with tabular data in Julia
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nalimilan Add fast grouping method for CategoricalArray keys (#1600)
When grouping on a single CategoricalArray column, we don't need a Dict to get group codes.
This approach cannot be used when joining, as the Dict is needed.
group_rows now handles the sorting, which allows skipping this step if the grouping
is guaranteed to be sorted (as is the case for CategoricalArray).
This mechanism can be extended in the future to handle multiple CategoricalArray keys,
or integer keys (using radix sort).
Latest commit 84a3f25 Nov 17, 2018

README.md

DataFrames.jl

0.6

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Tools for working with tabular data in Julia.

Installation: at the Julia REPL, Pkg.add("DataFrames")

Documentation:

Reporting Issues and Contributing: See CONTRIBUTING.md

Maintenance: DataFrames is maintained collectively by the JuliaData collaborators. Responsiveness to pull requests and issues can vary, depending on the availability of key collaborators.