$ sudo apt-get update
$ sudo apt-get install octave-optiminterp 

octave-optiminterp is installed in your system.

Make ensure the octave-optiminterp package were installed using the commands given below,

$ sudo dpkg-query -l | grep octave-optiminterp *

You will get with octave-optiminterp package name, version, architecture and description in a table

octave-optiminterp package basic information: