-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Thursday 05 June 2003 02:55 pm, Philip Webb wrote: > 030605 Praedor Atrebates wrote: > > Normally, one takes a datafile and plots it in some software program > > -- I use xmgrace -- and then extracts information from the plot > > such as a formula for a curve fit (linear regression, quadratic, etc). > > My special need is to extract a formula for a curve that is hand-drawn. > > Say I need a generic, closest match formula to approximate a curve form, > > but I do not have any data to plot out. Can anyone recommend software > > or a means to extract a formula that most closely matches the curve? > > it looks like G3data is what you need: it's in Cooker > or at http://beam.helsinki.fi/~frantz/software/g3data.php .
Thanks! That did the trick, after a fashion. Extracted arbitrary numbers to correspond to points on an arbitrary drawn curve and used xmgrace to derive a formula for the curve. Now I just need to post to the author that the GUI needs a little work - it behaves like a motif/lesstif interface in that it runs off the sides of the screen instead of automatically clipping/sizing itself to fit within the current screen/resolution. praedor - -- Gods are fragile things; they may be killed by a whiff of science or a dose of common sense. -- Chapman Cohen Fingerprint: D170 2A02 B426 6AA0 5E68 3EDC 68AA FDB0 961E 4F18 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (GNU/Linux) iD8DBQE+37AiaKr9sJYeTxgRAk+jAJ9IAAFkEsW9MybEwGewRJYqmDnt3wCgg8fn J9B6e3To8keToGSJvP3byDY= =y0Z6 -----END PGP SIGNATURE-----
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