A genomics-specific visualization type is plots along genomic coordinates. There are several packages that create attractive displays of along-genome data tracks, including Gviz and ggbio (Fig. 3). These packages operate directly on common Bioconductor data structures and thus integrate with available data manipulation and modeling functionality. A basic operation underlying such visualizations is computing with genomic regions, and the biovizBase package provides a bridge between the Ranges infrastructure and plotting packages. Direct communication between R and genome browsers is implemented by the rtracklayer (for the UCSC Genome Browser) and SRAdb (for the Integrative Genomics Viewer) packages. The epivizr package implements interactive visualization of user data within a lightweight genome browser [8].
