Tioga is a blend of PDF, pdfTex and ruby into a library to make scientific graphs of high quality. It is fairly complete and extensive, and comes with examples and (online) complete documentation. . Tioga is useful for scripting the generation of graphs, and comes with a configuration file for irb for interactive plotting of pictures. . This package is a dependency package, which depends on Debian's default Ruby version (currently 1.8.x).