Short info on using xgraph
---------------------------

The program is available in /usr/local/contrib/bin/xgraph
in science. If you have "/usr/local/contrib/bin/" in your
path, you can start it directly with the command xgraph.

  Say you have the following data in the file test.dat, 
and nothing else.

10 20
20 30
30 25
20 15

  You can plot it from the command line on an X terminal simply
using

xgraph test.dat

  If you have several data files, you can plot them all simply
with

xgraph file1 file2 file3

  From the mouse menu Hardcopy you can print the thing by selecting 

Postscript -> To File -> OK

and after this normally lpr xgraph.ps from the command line

  Additional information with man xgraph ja xgraph -h. 
A few especially useful options:

-lnx   Logarithmic scale for X axis
-lny   Logarithmic scale for Y axis
-m -M  Mark points distinctively (M varies with color)
-nl    Don't draw lines (scatter plot)
-p -P  Mark points with dot (P means big dot)
-tk    Draw tick marks instead of full grid