Using the HP 7550A Plotter with Gnuplot University of Hawaii at Manoa College of Engineering Gnuplot supports the Hewlett-Packard Graphics Language (HPGL) which is used for sending plots to the HP 7550A Plotter located in Holmes 244. You must use the set term command to set the terminal to hpgl, as shown: set term hpgl In addition to setting the terminal type for Gnuplot, you must also set the output file. There are two methods to plot your output to the plotter. You can first save the output to a file and send that file to the plotter, or you can directly print to the plotter. In order to send the output to a file, use the following set output command, substituting your own file name for filename.hpgl: set output "filename.hpgl" You then send that file to the HP 7550A plotter with this command: (Typed at the Unix prompt) lp -dhp7550a filename.hpgl You can also set the output file to plot directly to the plotter. However, remember to note that you must bring your own paper when sending the output to the plotter. In order to send the output to the plotter (thereby bypassing the need to create a plot file), use the following set output command: set output "|lp -dhp7550a" For both of these output methods, the file is not "sent" until another output (or the same output) file is selected, or until Gnuplot terminates. After you are done with one plot, simply type the same set output command to "flush" the file.

Author: Ben Yoshino (ben@wiliki.eng.hawaii.edu) Comments, Questions? | E-mail: webmaster@wiliki.eng.hawaii.edu Last updated on Thursday, August %.1d, 2002 Copyright © 2001 University of Hawai`i, College of Engineering, Computer Facility All rights reserved.