I’m trying to write some Kaggle Titanic code and to show context first: datadirectory = "../data/titanic/" train_df = CSV.read(datadirectory * "train.csv") describe(train_df) variable mean min median max nunique nmissing eltype Symbol Union… Any Union… Any Union… Union… Type 1 PassengerId 446.0 1 …

Because the categorical is a mapping from an underlying type (in your case presumably Int for Pclass and String for Sex) to a pool of levels, which are stored as UInt32

Dataframes and categorical, good style?

General Usage

StatisticalMouse October 24, 2020, 12:24pm 6

Oh! I see, so it’s fine.

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Dataframes and categorical, good style?

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