### B PONGO Command Definitions

This section gives detailed descriptions for each of the PONGO commands. The commands are listed in alphabetical order. A description of the command is followed by a usage section and then a description of each of the command parameters and its action. The usage section shows the order of any positional parameters and lists any other required values. Positional parameters may be optional, if a default exists, in which case they are shown in []. For example the usage section of BEGPLOT looks like:

#### Usage:

begplot [device] [action] [clear] [overlay]
$\left\{\right\$
label=?

action

In this case all the positional parameters ([device] [action] [clear] and [overlay]) are optional and have defaults. This example also shows that the use of a non-positional parameter ‘label’ is dependent on the value of the parameter ‘action’ (in fact it will only be used if action is set to ‘L’). You need to consult the full parameter descriptions to appreciate this. Non-positional parameters that are normally defaulted are not shown in the usage section.

The full parameter descriptions include default behaviour; i.e. what value is taken if a parameter value is not given on the command line. For simple cases, this behaviour is described in [ square brackets ]; for more complicated behaviour, a full description is provided. An empty set of square brackets, i.e. [], indicates that a parameter value must be specified on the command line.

Commands that are described as ICL procedures can only take parameters on the command-line. These should be given as single values in the correct order – not as keyword=value pairs.

Commands that are described as synonyms such as CHANGE LINEWID= must be given a single value for the first parameter.

If you are using CL then still consult this section, but use the on-line help and the lparam command to determine the order and availability of any parameters. You should also ignore any references to global parameters (and in particular the behaviour of parameters when they are specified on the command-line).