An Efficient Cost-Sensitive Feature Selection Using Chaos Genetic Algorithm for Class Imbalance Problem

Table 3

Class distribution in the raw and experimental datasets of the KDD Cup’99 dataset.

Type	DOS	U2R	R2L	PROBE	Normal
Number	391458	52	1126	4107	97278
Percentage	79.23%	0.01%	0.23%	0.83%	19.69%