Distribution and interrelationship of contig score components. (A) Distribution of contig score components in 10 different assemblies spanning four species and three different assemblers. s(C_nuc) is the fraction of nucleotides in a contig whose sequence identity agrees with the aligned reads. s(C_cov) is the fraction of nucleotides in a contig that have one or more mapped reads. s(C_ord) is the fraction of reads that map to the contig in the correct orientation. s(C_seg) is the probability that the read coverage along the length of the contig is best explained by a single Dirichlet distribution, as opposed to two or more distributions. (B) The Spearman's rank correlation coefficient between the contig score components, averaged across all species and assemblers.