Normalized compression distance
User:Vitanyi/Normalized Compression Distance; Wikipedia talk:Articles for creation/Normalized Compression Distance; Normalized Compression Distance
Normalized compression distance (NCD) is a way of measuring the similarity between two objects, be it two documents, two letters, two emails, two music scores, two languages, two programs, two pictures, two systems, two genomes, to name a few. Such a measurement should not be application dependent or arbitrary.