get the entropy of the second clustering using log_2 . not normalized , 0 = equal concode_field_sep double entropySecond concode_elem_sep double entropyFirst concode_elem_sep double entropyJoint concode_field_sep double entropyJoint concode_elem_sep double entropyConditionalSecond concode_elem_sep double entropyFirst concode_elem_sep double variationOfInformation concode_elem_sep double entropyNMISum concode_elem_sep double entropyPowers concode_elem_sep double entropyNMISqrt concode_elem_sep double entropyNMIMin concode_elem_sep double entropyConditionalFirst concode_elem_sep double entropyMutualInformation concode_elem_sep double normalizedVariationOfInformation concode_elem_sep double entropyNMIMax concode_elem_sep double entropyNMIJoint
double function ( ) { return entropySecond ; }