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Re: st: Fitting the integral of a unknown function


From   Svend Juul <SJ@SOCI.AU.DK>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Fitting the integral of a unknown function
Date   Fri, 6 Feb 2009 09:51:40 +0100

Tiago wrote:
 
I am unsure if the topic is 100% related to the objective I am looking
for, because I failed to find an exact expression in English.
 
I have two positively correlated variables (say, X and Y) that can range
from 0 to 1.
 
For every value of X (0 to 1) I have values for Y, giving a non-linear
curve. Is it possible to calculate the area under the curve having only
these data?

=======================================================
 
This looks like a pharmaco-kinetic problem where you want to
estimate the area under a concentration curve. Take a look at:
 
   help pkexamine
 
Hope this helps
Svend
 
________________________________________________________ 
 
Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Bartholins Allé 2
DK-8000 Aarhus C,  Denmark 
Phone, work:   +45 8942 6090 
Phone, home:   +45 8693 7796 
Fax:           +45 8613 1580 
E-mail:        sj@soci.au.dk 
_________________________________________________________ 

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