gri software package provides a language for scientific illustration, you can install in your Ubuntu 16.10 (Yakkety Yak) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gri
gri is installed in your system.
Make ensure the gri package were installed using the commands given below,
$ sudo dpkg-query -l | grep gri *
You will get with gri package name, version, architecture and description in a table
| Distro | Ubuntu 16 10 yakkety yak |
| Section | Science |
| Package | gri |
| Version | 2.12.23-10 |
| Description | a language for scientific illustration |
| Sub Section | Science |