This directory contains  :
	xplot, a plot(1) filter for X11.
	hpglplot, a plot(1) filter for hpgl.
	graplot, a plot(1) filter for grap output.

Xplot is derived from sunplot which arrived on the net a while ago. This
program will open an X window for the plot output. After running make,
try 
	scat -E -Lw < data | xplot =300x300+100+100

It seems impossible to do some of the things required for simple plots,
if using plot(5) only. Things like rotation and centering of labels are
essential. Hence we have enhanced the commands a bit, and the
enhancements are used by scat only if a special option is used. The
enclosed plot-filters support these extensions.

The hpgl-filter is a modified version of an hpgl-filter which arrived on
the net. The modifications are simply to allow for rotation and
centering. These modifications are the only reasons for reposting.

Graplot will take plot(5)-data and write output for the grap-program.
This is extremely handy for putting into a troff-style paper.

I (gunnar@hafro) apologize for not having gotten formal permission from
previous authors (notable Jim Constantine and Scott Sutherland)
to publish this modification of their code.
Their code was published on the net, however, and no E-mail 
addresses remained in the files when I obtained them.

WARNING: There is a bug in xplot. For some strange reason, the window
manager awm will crash when xplot is started without any coordinate
options. This is easily solved by always using some coordinates,
e.g. scat < data | plot -Tx =300x300+100+100 -- or as in the above example.
If anyone finds the problem, please let me know. The problem does not
seem to appear with uwm.
