Finally, you are happy with the way your graph looks, so you want to print it out on paper. Many types of hardcopy devices are supported within physica, and the one you will be using is the postscript type. This is the default type selected by physica when it starts; you may want to verify this by looking at the first line under the start-up banner of physica. If for some reason, a different type of print device got selected you can always change it by typing:
PHYSICA: device postscript
PostScript is the name of a ``page description language'' that is understood by many high-quality printers out there, including the ones at Brock. The printers are known to physica by their Unix names, and the ones you need to know about are:
Once you know the name of the printer you want to use, get the hardcopy output by following this example:
P - Print on a queue
S - Save into a file
A - Auxiliary port output
command >> p
queue (default= POST_SCRIPT) >> lj-physics
The only things you have to type in here are: p, the command to print, and lj-physics, the name of the printer. The rest of the text shown above is supplied by physica to prompt you.
As you can tell, you could also save the output to a file for printing later or for including it in your lab report, by typing s instead of p, and then by supplying the filename at the last prompt.
If you change your mind in the middle of a hardcopy command, you can use Ctrl-d to interrupt it and to return to the physica prompt.
Note that you need to set the device type only once per physica session. In fact, you may want to create a .physicarc file in your home directory which contains the command device postscript. Next time you start physica, the proper device type will be selected for you.