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Larsen Ch. 10 - Data Transformations (Transformations (Subtraction (-),…
Larsen Ch. 10 - Data Transformations
Data Transformations
Text - Extract new columns from columns containing text
Categorical - combine many categories into fewer
Numerical - Add subtract multiply etc. multiple columns to create new ones
IF THEN STATEMENTS
Creates new content in new column based on what exists in other columns
One Hot Encoding: conversion of categorical column containing two or more possible values into discrete columns representing each value.
improves predictive ability
Transformations
Subtraction (-)
Absolute ABS ()
Addition ( +)
Multiplication (*)
Division (/)
Less Than (<)
Less Than or Equal To (<=)
Greater Than( >)
Greater Than or Equal To (>=)
Not Equal (!=)
Equal (= =)
Exponentiation (**)
Natural Log - Log ()
Square Root - SqRT ()
Square - Square ()