The BigWig format is ideal for viewing continuous value plot data, such as read depths from short read sequencing projects or levels of conservation observed in a multiple-species alignment. BigWig files contain lists of chromosome segments that may be displayed as a bar or line graph. Although each BigWig file contains only a single value for any given base, BigWig tracks are often combined into a ‘multiWig’ display that allows multiple BigWig files to be overlaid on the same axis.
