Aggregate function (not to be confounded with
aggregate) prepares a data frame for merging by computing the sum, mean and variance of all continuous (integer and numeric) variables by a given ID variable.
It also creates dummies for all categorical variables (character and factor) and subsequently computes the sum by a given ID variable. This functions aims at maximal information extraction with a minimal amount of code.
A data frame without the ID. Categorical variables have to be of type character or factor and continuous variables have to be of type integer or numeric.
A vector containing ID”s.
A data frame with the aforementioned variables aggregated by the given ID variables.
Dirk Van den Poel, Michel Ballings, Andrey Volkov, Jeroen D”haen, Michiel Van Herwegen
Maintainer: Michel Ballings <Michel.Ballings@GMail.com>
Van den Poel, D., Ballings, M., Volkov, A., D”haen, J., Van Herwegen, M., Predictive Analytics for analytical Customer Relationship Management using SAS, Oracle and R, Springer, Forthcoming.
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