[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Integrating functions with with constant arguments
From: |
John Dalton |
Subject: |
Integrating functions with with constant arguments |
Date: |
Tue, 15 Aug 2006 15:29:48 +1000 |
QUESTION 1:
I'm trying to run the following function under octave:
function z = test_handle(t)
z = quad(@(x) pow2(x, t), 0.5, 1);
end
It is an integration with a constant argument in the integrand function.
It works in Matlab, but octave 2.1.73 fails with the
following error.
error: `t' undefined
According to this post:
http://velveeta.che.wisc.edu/octave/lists/archive//octave-maintainers.2002/msg00110.html
it should work. I've also tried making 't' global ("global t") and
also tried using a global intermediate variable between the argument t
and its use as a parameter to pow2. If pow2 is replaced with a user
defined function (say fun2) the code fails saying "fun2" is not
defined. It's as if the evaluation of quad's argument function is
not seeing the parent's environment.
QUESTION 2:
As an aside, I also did the following test:
octave:5> global a=3;is_global('a')
ans = 0
I would have though the answer should be '1'.
Sorry if these are FAQs. I have spent a day looking for an
answer but have not found one (apart from the email above).
Any help will be appreciated very much. (Thanks in advance.)
Regards
John Dalton