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st: Fitting the integral of a unknown function


From   "Tiago V. Pereira" <tiago.pereira@incor.usp.br>
To   statalist@hsphsun2.harvard.edu
Subject   st: Fitting the integral of a unknown function
Date   Thu, 5 Feb 2009 18:59:50 -0200 (BRST)

Dear statalisters,

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?

All the best,

Tiago




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