How to Install and Uninstall gri Package on openSUSE Leap

Information for package gri:
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Repository : Main Repository
Name : gri
Version : 2.12.23-bp155.3.12
Arch : x86_64
Vendor : openSUSE
Installed Size : 5.3 MiB
Installed : No
Status : not installed
Source package : gri-2.12.23-bp155.3.12.src
Upstream URL : http://gri.sourceforge.net
Summary : A language for scientific illustration
Description :
Gri is a language for scientific graphics programming. It is a
command-driven application, as opposed to a click/point application.
It is analogous to latex, and shares the property that extensive power
is the reward for tolerating a modest learning curve. Gri output is
in industry-standard PostScript, suitable for incorporation in
documents prepared by various text processors.
Gri can make x-y graphs, contour-graphs, and image graphs. In
addition to high-level capabilities, it has enough low-level
capabilities to allow users to achieve a high degree of customization.
Precise control is extended to all aspects of drawing, including
line-widths, colors, and fonts. Text includes a subset of the tex
language, so that it is easy to incorporate Greek letters and
mathematical symbols in labels.