ruby-pgplot 0.1.9-3build3 (ppc64el binary) in ubuntu cosmic

 Ruby/PGPLOT is the Ruby interface to the PGPLOT graphics library.
 PGPLOT is a FORTRAN library to draw line/scatter/histogram plot, error
 bar, contour/image/vector map, etc. Supports various output devices
 including Postscript, PNG, X-Window, etc.