public double entropyNMISqrt(){
  if (entropyFirst() * entropySecond() <= 0) {
    return entropyMutualInformation();
  }
  return (entropyMutualInformation() / Math.sqrt(entropyFirst() * entropySecond()));
}

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