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R: st: How to perform a productory


From   "Carlo Lazzaro" <carlo.lazzaro@tin.it>
To   <statalist@hsphsun2.harvard.edu>
Subject   R: st: How to perform a productory
Date   Mon, 22 Oct 2007 19:08:35 +0200

Dear Josè Maria,

In Italian we have both Sommatoria (upper-case sigma) and Produttoria
(upper-case GreeK pi). Today, thanks to Nick, I have learnt that the latter
is running product in English.

Many thanks for having helped me out to solve this matter.

Ciao (this one should cross the international boundaries!),

Carlo
-----Messaggio originale-----
Da: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Per conto di josemaria
Inviato: lunedì 22 ottobre 2007 19.56
A: statalist@hsphsun2.harvard.edu
Oggetto: Re: st: How to perform a productory

In Portuguese, we have somatório, same as soma (sum), but we do not have 
produtório.
José Maria
José Maria Pacheco de Souza, Professor Titular (aposentado)
Departamento de Epidemiologia
Faculdade de Saúde Pública/Universidade de São Paulo
Av. Dr. Arnaldo, 715 cep 01246-904
São Paulo Brasil
fones   (11)3061-7747 (11)3061-7724 (11)3714-2403  (11)3768-8612
fax   (11)3082-2920  (11)3714-2403
www.fsp.usp.br/~jmpsouza
jmpsouza@usp.br

----- Original Message ----- 
From: "n j cox" <n.j.cox@durham.ac.uk>
To: <statalist@hsphsun2.harvard.edu>
Sent: Monday, October 22, 2007 11:24 AM
Subject: Re: st: How to perform a productory


>I Googled "productory" and didn't find anything recognisable.
> Perhaps you want a running product.
>
> gen runningproduct = exp(sum(log(K_1)))
>
> Alternatively, if you ask in Italian, somebody should
> recognise what you want. There is no "English only" rule.
>
> Nick
> n.j.cox@durham.ac.uk
>
> Carlo Lazzaro
>
> I have a variable including 30 obs (please see beneath. I would like to
> calculate a productory but I have neither found out a Stata 9/2 useful
> in-built function nor a helpful FAQ (or it seems so).
>
> K_1
> .9666666
> 1
> .9642857
> 1
> .9615384
> 1
> .9583333
> .9565217
> 1
> .952381
> .95
> .9473684
> .9444444
> .9411765
> 1
> .9333333
> 1
> 1
> 1
> .9090909
> 1
> .8888889
> .875
> .8571429
> .8333333
> .8
> .75
> 1
> 1
> 1
>
>
> *
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>
>
>
> -- 
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> 

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