Attempts to prepare a clean dataset to prepare to put in a
Factors and characters are converted to numeric (specifically: integer).
In addition, keeps rules created so you can convert other datasets using this converter.
This is useful if you have a specific need for integer dataset instead of numeric dataset.
Note that there are programs which do not support integer-only input.
Consider this as a half memory technique which is dangerous, especially for LightGBM.
lgb.prepare_rules2(data, rules = NULL)
A data.frame or data.table to prepare.
A set of rules from the data preparator, if already used.
A list with the cleaned dataset (
data) and the rules (
The data must be converted to a matrix format (
as.matrix) for input in