View unanswered posts | View active topics
Forum rules
1. This forum can be used for discussion of both ALGLIB-related and general numerical analysis questions
2. This forum is English-only - postings in other languages will be removed.
 
|
Page 1 of 1
|
[ 2 posts ] |
|
| Author |
Message |
|
jeffj
|
Post subject: Number of intervals and function evaluations: Gauss-Kronrod  Posted: Tue May 27, 2014 7:06 pm |
|
Joined: Tue May 27, 2014 7:01 pm
Posts: 2
|
|
I'm under the impression that autogkintegrate with autogksmooth uses Gauss-Kronrod quadrature. The purpose of Kronrod rules is to reduce the number of function evaluations. Why does autogkreport.nintervals = 74 while autogkreport.nfev = 2205? Shouldn't there be fewer function evaluations?
Last edited by jeffj on Tue May 27, 2014 10:45 pm, edited 1 time in total.
|
|
| Top |
|
 |
|
jeffj
|
Post subject: Re: Number of intervals and function evaluations: Gauss-Kron Posted: Tue May 27, 2014 8:24 pm |
|
Joined: Tue May 27, 2014 7:01 pm
Posts: 2
|
|
I'll add that I discovered this because I noticed that it took autogkintegrate more than an order of magnitude longer to perform integration than the GNU GSL procedure gsl_integration_qag, and I was looking for the cause. I think the high number of evaluations is the culprit.
|
|
| Top |
|
|
|
|
Page 1 of 1
|
[ 2 posts ] |
|
Who is online |
Users browsing this forum: No registered users and 29 guests |
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum
|
Login
Register
FAQ
Search
