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Chapter 5: Over fitting and its avoidance (Topic overview: (Hold out data…
Chapter 5: Over fitting and its avoidance
Concepts
generalization
fitting and over fitting
complexity control
Topic overview:
Why is over fitting bad?
Over fitting in mathematical functions
From hold out to cross validation
Over fitting in tree induction
Learning curves
Hold out data and fitting graphs
Holdout data
base rate
Fitting graph
Over fitting avoidance and complexity control
A general method for avoiding over fitting
Regularisation
Avoiding overfitting with tree induction
Over fitting definition
Techniques
attribute selection
tree pruning
cross validation
regularisation