From help-request at octave dot org Tue Sep 28 13:07:00 2004
Subject: fourier coefficient - quad with more arguments?
From: Gerrit <gerrit at nl dot linux dot org>
To: help at octave dot org
Date: Tue, 28 Sep 2004 20:03:30 +0200

Hi,

I'm trying to do something like this:

all_a = ones(1, 20);
for k = 1:20
  function y = f(t)
    x = mod(t, pi);
    s = t*(pi-t);
    y = s*cos(k*t);
  endfunction
  a = (2/pi) * quad('f', 0, pi);
  all_a(k) = a;
endfor

But I get:

error: `k' undefined near line 8 column 15
error: evaluating binary operator `*' near line 8, column 16
error: evaluating argument list element number 1
error: evaluating binary operator `*' near line 8, column 10
error: evaluating assignment expression near line 8, column 7
error: called from `f'
error: evaluating for command near line 4, column 1
error: near line 13 of file `/srv/www/studie/s_en_t/opg15.m'

How do I pass the 'k' from the for loop into the function and calculate
the integration? I'm trying to calculate real fourier coefficients. Any
hints?

yours,
Gerrit.

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