octave-doc 4.2.1-4build2 (ppc64el binary) in ubuntu bionic

 Octave is a (mostly Matlab (R) compatible) high-level language, primarily
 intended for numerical computations. It provides a convenient command-line
 interface for solving linear and nonlinear problems numerically.
 .
 This package provides the following documentation in PDF format: a reference
 card in a4, letter and legal formats, a document on the C++ classes used by
 Octave, as well as the main octave documentation which is also included in
 info format in the octave-info package.