DefineVariable - define the data type and initial value of an array
variable
SYNOPSIS
DefineVariablearrayname variable_name type
initial_value
DESCRIPTION
The data type and initial value of a variable are usually set in the
.def file. This command will perform a similar function initialising the
parameter variable_name in array arrayname so that the commands
such as CreateLine have sufficient information to draw a widget
such as entry field, button or menu for the parameter. The data type type
should be set to something which is defined in the $CCP4I_top/etc/types.def
file and an initial value initial_value must be set but can be a
null string (i.e. "").
Note that only the parameters defined in a .def file are written out
to another .def file if the user opts to save the current status so any
parameter initialised with the DefineVariable command will NOT
be saved.