[comp.sys.mac] extracting data from graphs using a tablet

noell@mcnc.org (Matthew S. Noell) (03/02/90)

Does anyone have software for extracting x-y coordinates from
a graph (log-log, log-linear, etc.).  We have PENWORKS with a Kurta
tablet but it doesn't come with software that will allow you to
specify the x,y axis (log or linear), origin, and xmax, ymax, and
then write the data to a file.  As far as I can figure out, PENWORKS is
just a driver to use the tablet in applications like MacDraw.
I was hoping there would already be some public domain software
since I am sure others have wanted to do the same thing.

legler@masig2.masig1.ocean.fsu.edu (David M. Legler) (03/04/90)

In article <6283@alvin.mcnc.org> noell@mcnc.org (Matthew S. Noell) writes:

   Does anyone have software for extracting x-y coordinates from
   a graph (log-log, log-linear, etc.).  We have PENWORKS with a Kurta
   tablet but it doesn't come with software that will allow you to
   specify the x,y axis (log or linear), origin, and xmax, ymax, and
   then write the data to a file.  As far as I can figure out, PENWORKS is
   just a driver to use the tablet in applications like MacDraw.
   I was hoping there would already be some public domain software
   since I am sure others have wanted to do the same thing.

I had a similar problem, but solved this by finding a more generic
digitizer that would normally attach to a PC or another computer of
your choice and instead hooking it up to the Mac serial port.  Then
normal x,y coordinates were input to the Mac (which is running the
telecommunications program of your choice).   This probably doesn't
help you, but there might be a non-Mac digitizer within your grasp for
use in this type of situation.