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definite numerical integration
From: |
roberto |
Subject: |
definite numerical integration |
Date: |
Wed, 21 Sep 2005 11:37:54 +0200 |
hello,
i need some hint about the following topic:
1. take a function f(r; a), where "a" is a parameter, whose analytical
form i don't know explictly but i can evaluate it point by point in a
given interval [0,r_max]
(i already wrote Octave code for this);
2. i have to evaluate the definite integral of f(r; a) in [0,r*]
(where r*<r_max);
3. doing this, evaluating the integral by varying r* in [0,R] (e.g. R = 110)
i'll have a function F(r*,a) where a should be obtained by imposing
some boundary condition;
i looked for some help into Octave like
http://octave.sourceforge.net/index/Q.html
but in libraries like:
[v, ier, nfun, err] = quad (f, a, b, tol, sing)
the function to be integrated are to be inserted by their explicit formulation
which i don't have now, as already stated above;
thank you very much for any help about this topic, since it's the last
step of my work up to now
bye
--
roberto
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