question: public double entropyNMISqrt ( ) { if ( entropyFirst ( ) * entropySecond ( ) <= 0 ) { return entropyMutualInformation ( ) ; } return ( entropyMutualInformation ( ) / Math . sqrt ( entropyFirst ( ) * entropySecond ( ) ) ) ; }
target:  Get the sqrt-normalized mutual information (normalized, 0 = unequal)