InformationMetrics.h File Reference

some metrics used when train decision trees More...

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Classes
struct	Entropy
struct	GiniIndex
struct	ClassificationError

Functions
double	entropy (const double *p, int n)
	compute entropy of n-classes distribution
double	entropy (double p)
	Entropy in binary case (p0=p, p1=1.0-p)
double	gini_index (const double *p, int n)
	gini index in a n-classes distributions
double	gini_index (double p)
	Gini Index in binary case (p0=p, p1=1.0-p)
double	classification_error (const double *p, int n)
	classification error in n-classes distribution
double	classification_error (double p)
	classification error in binary case

Detailed Description

some metrics used when train decision trees