From: gautier_niouzes@hotmail.com
Cc: nma@12000.org
Subject: Re: Does Ada need elemental functions to make it suitable for scientific work?
Date: Tue, 10 Jul 2012 01:06:15 -0700 (PDT)
Date: 2012-07-10T01:06:15-07:00 [thread overview]
Message-ID: <76f6881a-cde1-4653-b97d-78a6fceea025@googlegroups.com> (raw)
In-Reply-To: <18c77859-480c-41f5-bb1c-df7ad067f4f3@googlegroups.com>
Le mardi 10 juillet 2012 07:22:58 UTC+2, Ada novice a écrit :
> Believe me, for someone who do numerical computations on a daily basis, an operation like V**2 is a NECESSITY. It's a pity that Ada does not offer such a facility. I do not blame those who stick to Matlab (or Fortran?) for doing numerical computations.
Wait... There are *such* facilities and several built-in operations *like* that:
http://www.ada-auth.org/standards/12rm/html/RM-G-3-1.html
Apparently it is not enough. But it is possible to make a proposal for the next standard (and shorter term, for the next GNAT version).
The snag with that *specific* operation, v**2 meaning "v(i)**2 for each i", is that it is counter-intuitive from a linear algebra point of view. You would rather expect v**2 = v*v. Now another snag is should "*" be the dot or the cross product ?...
These kind of things are thought-out carefully before landing into an Ada standard...
G.
next prev parent reply other threads:[~2012-07-10 8:06 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-09 23:27 Does Ada need elemental functions to make it suitable for scientific work? Nasser M. Abbasi
[not found] ` <d78nv7dhf88bqv7hrd9eft231a4h2scs10@invalid.netcom.com>
2012-07-10 4:22 ` Nasser M. Abbasi
2012-07-10 14:26 ` Marco
2012-07-10 4:24 ` gautier_niouzes
2012-07-10 5:22 ` Ada novice
2012-07-10 7:27 ` Dmitry A. Kazakov
2012-07-10 8:06 ` gautier_niouzes [this message]
[not found] ` <637de084-0e71-4077-a1c5-fc4200cad3cf@googlegroups.com>
2012-07-10 8:39 ` Nasser M. Abbasi
2012-07-10 8:58 ` Ada novice
2012-07-10 9:07 ` Dmitry A. Kazakov
2012-07-10 9:21 ` Nasser M. Abbasi
2012-07-10 9:26 ` Nasser M. Abbasi
2012-07-10 9:50 ` Dmitry A. Kazakov
2012-07-20 1:56 ` Randy Brukardt
2012-07-20 21:49 ` Adam Beneschan
2012-07-12 0:31 ` robin.vowels
2012-07-12 7:12 ` Dmitry A. Kazakov
2012-07-29 13:39 ` Robin Vowels
2012-07-29 14:22 ` Dmitry A. Kazakov
2012-07-29 20:54 ` glen herrmannsfeldt
[not found] ` <apib1897s56dkultqmfl3emvk1os3tfdak@invalid.netcom.com>
2012-07-30 4:15 ` glen herrmannsfeldt
[not found] ` <nfhd181tv9u87mcqfb7rgd8lm48ihr9f4r@invalid.netcom.com>
2012-07-31 8:53 ` MATRIX MULTIPLICATION Robin Vowels
2012-07-31 9:05 ` Robin Vowels
2012-07-30 0:49 ` Does Ada need elemental functions to make it suitable for scientific work? Robin Vowels
2012-07-12 0:22 ` robin.vowels
2012-07-20 1:51 ` Randy Brukardt
2012-07-29 13:53 ` Robin Vowels
2012-07-29 15:51 ` J-P. Rosen
2012-07-29 16:07 ` Dmitry A. Kazakov
2012-07-29 20:30 ` Simon Wright
2012-07-29 20:59 ` glen herrmannsfeldt
2012-07-29 21:44 ` J-P. Rosen
2012-07-29 22:54 ` Simon Wright
2012-07-30 0:53 ` Robin Vowels
2012-07-30 2:20 ` Shmuel Metz
2012-07-10 12:46 ` Brian Drummond
2012-07-10 11:06 ` Simon Wright
2012-07-10 11:59 ` Georg Bauhaus
2012-07-10 12:20 ` Brian Drummond
2012-07-10 19:52 ` Ada novice
2012-07-11 8:41 ` gautier_niouzes
2012-07-11 9:42 ` Ken Thomas
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