New user of Mathematica (FORTRAN related question)
- To: mathgroup at smc.vnet.net
- Subject: [mg30870] New user of Mathematica (FORTRAN related question)
- From: Jorge Luis LLanio Trujillo <jolla at taurus.ci.uc.pt>
- Date: Fri, 21 Sep 2001 04:04:08 -0400 (EDT)
- Organization: Universidade de Coimbra
- Sender: owner-wri-mathgroup at wolfram.com
Dear all, i have some questions to ask
Q1: How to force mathematica to write to my output file file.f
FORTRAN-compliant 72-character lines and also a continuation mark (*
for example) in the 6 columns? It seems to me that FortranForm[]
produce very bad fortran syntaxis.
I need to compile this file after using MATHEMATICA ( f77 Digital
Unix)
I mean,
FortranForm[D[f,x1,x2]] >> file.f
The file file.f gives me a bunch of compilation errors.
Q2: Why Mathematica fails to do the substitution(and others like that):
________________________________
/ 2 2 2
D[y,x1,x2] /. \/ (x4-x1) + (x5-x2) + (x6-x3) -> R1
here y is some function of x1 and x2
Thanks very much for the help,
Jorge