Table 1.

The calculation and use of four types of R-Correlation

R-Correlation	Calculation	Applied in/to
R1: R(f i,C)	SUi,C	$\left\{{\Omega }_k\right\},M_s,G\subseteq {\cup }_u{M}_s^p\left[u\right]$
		ε-Estimation
R2: R(f ij,C)	SUi,j;C	Strongly Relevant f ij
		ε-Estimation
R3: R(f i,f j)	SUi,j	ε-Estimation
R4: R(f i,C|M s)	CMI (f i,C|M s)	Feature Redundancy