From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (from majordomo@localhost) by pauillac.inria.fr (8.7.6/8.7.3) id TAA28725; Mon, 28 Apr 2003 19:44:38 +0200 (MET DST) X-Authentication-Warning: pauillac.inria.fr: majordomo set sender to owner-caml-list@pauillac.inria.fr using -f Received: from concorde.inria.fr (concorde.inria.fr [192.93.2.39]) by pauillac.inria.fr (8.7.6/8.7.3) with ESMTP id TAA28754 for ; Mon, 28 Apr 2003 19:44:17 +0200 (MET DST) Received: from comtv.ru (comtv.ru [217.10.32.4]) by concorde.inria.fr (8.11.1/8.11.1) with ESMTP id h3SHiGH12863 for ; Mon, 28 Apr 2003 19:44:16 +0200 (MET DST) Received: from [10.0.66.9] ([10.0.66.9] verified) by comtv.ru (CommuniGate Pro SMTP 4.0.6) with ESMTP id 8715963; Mon, 28 Apr 2003 21:43:13 +0400 Date: Mon, 28 Apr 2003 21:45:32 +0400 (MSD) From: malc X-X-Sender: malc@home.oyster.ru To: Siegfried Gonzi cc: caml-list@inria.fr Subject: Re: [Caml-list] Easy solution in OCaml? In-Reply-To: <3EA8D012.8040700@stud.uni-graz.at> Message-ID: References: <3EA8D012.8040700@stud.uni-graz.at> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Spam: no; 0.00; malc:01 pulsesoft:01 caml-list:01 siegfried:01 gonzi:01 bigloo:01 matlab:01 dependencies:01 quarterly:99 failwith:01 compiler:01 ocaml:01 rec:01 wrote:03 scheme:03 Sender: owner-caml-list@pauillac.inria.fr Precedence: bulk On Fri, 25 Apr 2003, Siegfried Gonzi wrote: > Hi: > > First off: It is not homework. I am 29 and writing my PhD in physics. > Often I am contemplating whether it would be possible to use OCaml in > combination with my beloved Bigloo to perform statistical evaluations. I > am not sure whether there are any out there who /can/ do this > evaluations with OCaml what you normally would do with Matlab. The > problem what arises: type system and working against the compiler. In > Scheme changing a solution from lets say integer-array to double-array > is easy, but in Clean for example you would have to change all your > dependencies. > I often skim over the libraries and came to the conclusion: C, C++, > OCaml impossible for me to see any elegance; Clean a bit better; > Bigloo/Scheme: I am not sure here, because everything looks the same > maybe this is cheating, but I think it looks the most elegant and less > intimitating from all. > > > Rationale: given a list of 12 month. I would like to calculate the > quarterly means and skip any nan. Easy? Yes it is but only on paper and > in Scheme: > > e.g: [1,2,4,-1,45,56,45,56,8] > > nan=-1.0 > > result: [(1+2+3)/3, (45+56)/2, (45+56+8)/3] let nan = -1 let mean a b c = (a + b + c) / 3 let rec qmean = function a :: b :: c :: rest -> mean a b c :: qmean rest | [] -> [] | otherwise -> failwith "malformed list" let _ = let months = [1; 2; 4; -1; 45; 56; 45; 56; 8] in let denan = List.map (fun x -> if x = nan then 0 else x) months in qmean denan -- mailto:malc@pulsesoft.com ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners