[R] R and Fortran 9x -- advice

Mon Nov 13 20:26:41 CET 2006

Metcalf and Reid - FORTRAN 90/95 Explained

Ravi.

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Ravi Varadhan, Ph.D.

Assistant Professor, The Center on Aging and Health

Division of Geriatric Medicine and Gerontology 

Johns Hopkins University

Ph: (410) 502-2619

Fax: (410) 614-9625

Email: rvaradhan at jhmi.edu

Webpage:  http://www.jhsph.edu/agingandhealth/People/Faculty/Varadhan.html

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-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Christos Hatzis
Sent: Monday, November 13, 2006 2:05 PM
To: 'Mike Prager'; r-help at stat.math.ethz.ch
Subject: Re: [R] R and Fortran 9x -- advice

Mike,

Can you recommend any good books on Fortran 90/95?  I had been an old user
of Fortran 77 but haven't followed the developments in the last 15 years or
so...

Thanks.

Christos Hatzis, Ph.D.
Nuvera Biosciences, Inc.
400 West Cummings Park
Suite 5350
Woburn, MA 01801
Tel: 781-938-3830
www.nuverabio.com

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Mike Prager
Sent: Monday, November 13, 2006 1:00 PM
To: r-help at stat.math.ethz.ch
Subject: Re: [R] R and Fortran 9x -- advice

Tamas K Papp <tpapp at princeton.edu> wrote:

> I found some bottlenecks in my R code with Rprof.  First I wanted to 
> rewrite them in C, but a colleague keeps suggesting that I learn 
> Fortran, so maybe this is the time to do it...
> 
> 1) I hear bad things about Fortran.  Sure, F77 looks archaic, but
> F90/95 seems nicer.  Is it worth learning, especially when I plan to 
> use it mainly from R?  Dusting off my C knowledge would take a bit of 
> time too, and I never liked C that much.

I'll answer this from the perspective of someone who uses Fortran 95
regularly.  It is a modern language, far more reliable and flexible than
Fortran 77 and quite well suited to most scientific problems.  I do think
it's worth learning, particularly if C is not to your taste.

Two free compilers for Fortran 95 are available.  It seems that
g95 is complete, while gfortran is nearing completion.  There are also
several high-quality commercial compilers, some of which are free under
certain operating systems and/or conditions and others of which (Lahey) are
quite inexpensive if one is willing to work from the command line or one's
own editor.

I can't address questions of R interoperability  -- not something I've done.

--
Mike Prager, NOAA, Beaufort, NC
* Opinions expressed are personal and not represented otherwise.
* Any use of tradenames does not constitute a NOAA endorsement.

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