🚀 go-pugleaf

In article <14737.2b0bf3a9@ohstpy.mps.ohio-state.edu> luk@ohstpy.mps.ohio-state.edu writes:
>I am looking for a routine for contour plot, given discrete numerical
>data f(x,y) on a rectangular region.  Can anyone help

I have been pleased with the NCAR routines.  Although the "meta" file
it writes was a bit hard to get used to at first, the fitting
routines worked well for my rectangular-grid application.

Dunno if these are publicly available -- anyone know where or how to
get a hold of these?

>luk


-- 
                                     |
Michael Zika (zika@ecn.purdue.edu)   |    Hey don't ask me "why?",
Purdue University                    |    I'm still working on "how?" ! 
School of Nuclear Engineering        |

luk@ohstpy.mps.ohio-state.edu writes:

>I am looking for a routine for contour plot, given discrete numerical data 
>f(x,y) on a rectangular region.  Can anyone help

I'm not positive it does what you want, but the public domain Gnuplot 3.2
does 3d plots and the manual says it does contours. I've used it for 2d
plots and have been quite pleased. It has a variety of output options and
has been ported to a number of different platforms (DOS, X, Next...).

DOS executables can be found at oak.oakland.edu in pub/msdos/plot/gnuplt32.
zip (note the lack of 'o' in gnuplt). The official repository is dartvax.
dartmouth.edu (they don't have DOS executables there, but do have the
source code).

Good luck,
Bill Goffe
bgoffe@seq.uncwil.edu

In <14737.2b0bf3a9@ohstpy.mps.ohio-state.edu>
	luk@ohstpy.mps.ohio-state.edu writes:

>I am looking for a routine for contour plot, given discrete numerical data 
>f(x,y) on a rectangular region.  Can anyone help

Algorithm 626, by Albrecht Preusser,  ACM Transactions on Mathematical
Software, v.10, no.4, p. 473 (1984).  In Fortran.  Routine tricp takes 3
arrays x,y,z and plots the contours of z vs. x,y.  Calls the Calcomp
routines plots and plot(x,y,ipen); it's easy to supply your own and
intercept the generated pen strokes.

Source available from netlib.  "send 626 from toms".  Have fun.
-- 

--Pierre Asselin, Santa Barbara, California
  pa@verano.sba.ca.us

In <1992Nov20.140344.22437@seq.uncwil.edu> bgoffe@seq.uncwil.edu (Bill Goffe) writes:

>luk@ohstpy.mps.ohio-state.edu writes:

>I'm not positive it does what you want, but the public domain Gnuplot 3.2
>does 3d plots and the manual says it does contours.

Yes it does, but only for data on a regular grid (I have version 3.0,
patch 1) It's also an interactive program, as opposed to a subroutine.
The TOMS algorithm I mentioned in another post handles arbitrary data
--it triangulates the x-y plane.

(Gnuplot IS handy to have!)
-- 

--Pierre Asselin, Santa Barbara, California
  pa@verano.sba.ca.us