a50 (hackage): a50 - a simple tool for graphing genome coverage and fragmentation.  Reads files of contigs, and compares them by plotting each as a line in a graph. The x-axis represents contig number, the y-axis represents total (cumulative) size. An ideal assembly contains a few, large contigs, thus this curve should rise steeply, and stop early (but at the expected genome size).  Conversely, a poor assembly consisting of many small fragments will have a less steep curve extending far to the right.  The graphs produced by a50 gives a simple and easy to grasp comparison between assemblies, and yet produces a more detailed and informative view than the usual metrics like largest contig size or N50.  The Darcs repository is at http://malde.org/~ketil/biohaskell/a50.
Keywords: bioinformatics|program