1 Introduction

PONGO is a set of commands for interactively plotting data stored in ordinary text files. It is based around the PGPLOT (SUN/15) graphics package.

Some highlights of PONGO are:

PONGO can used from both the Starlink/ICL and IRAF/CL 1 command languages and integrates with other Starlink software packages.

Because the parameters PONGO uses for its commands are often similar to the arguments of the equivalent PGPLOT subroutines, it is useful to read the PGPLOT manual in conjunction with this user guide (if you are not already familiar with PGPLOT). In several cases the full descriptions of the parameters are given only in the PGPLOT manual.

1at the time of writing IRAF support is no longer available in a standard release