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Simple preprocessing methods
I'm looking for simple preprocessing methods.
Maybe I'm just blind but I can't find anything that matches my criteria.
1. A simple recoding.
For example produce an atrribute B out of an existing attribute A (containing values from 1 to 5) by the following rules:
A: 1,2 --> B: 1
A: 3,4 --> B: 2
A: 5 --> B: 3
2. A simple condition-knot.
For example produce an attribute B out of an existing attribute A (containing ages of humans) like this:
A: 1-18 / to 18 --> B: 1 or "young"
A: 19-40 --> B: 2 or "midage"
A: from 41--> B: 3 or "old"
Thank you in advance.
Greets from the baltic sea,