Not only that, it also runs v5, so it's even worse than just a dependency mix-up.
My Xenial version (as of March 2017): Linux ubuntu 4.4.0-66-generic #87-Ubuntu SMP Fri Mar 3 15:29:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux Repo info is wrong: gnuplot: Installed: 4.6.6-3 Candidate: 4.6.6-3 And the package is wrong: user@ubuntu:~/data$ which gnuplot5 /usr/bin/gnuplot5 user@ubuntu:~/data$ which gnuplot /usr/bin/gnuplot user@ubuntu:~/data$ gnuplot G N U P L O T Version 5.0 patchlevel 3 last modified 2016-02-21 <=========== v5.0 started Copyright (C) 1986-1993, 1998, 2004, 2007-2016 Thomas Williams, Colin Kelley and many others gnuplot home: http://www.gnuplot.info faq, bugs, etc: type "help FAQ" immediate help: type "help" (plot window: hit 'h') Terminal type set to 'qt' -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1576849 Title: dependency mixup of gnuplot and gnuplot5 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnuplot/+bug/1576849/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs