aN50 and N90 are defined as the length of the smallest contig N in the sorted list of all contigs where the cumulative length from the largest contig to contig N is at least 50% and 90% of the total l
N75 length is defined as the length N for which 75% of all bases in the sequences are in a sequence of length L N50 length is defined as the length N for which 50% of all bases in the sequences are i