[ADMB Users] Cubic splines

Mark Maunder mmaunder at iattc.org
Fri May 20 11:40:12 PDT 2011

Does anyone have documentation on how cubic splines are implemented in ADMB? Or a simple description of how cubic splines are implemented in general.

There are some examples on how to use them in ADMB






Mark Maunder

Head of the Stock Assessment Program
Inter-American  Tropical Tuna Commission

ADMB Foundation

8604 La Jolla Shores Drive
La Jolla, CA, 92037-1508, USA

Tel: (858) 546-7027
Fax: (858) 546-7133
mmaunder at iattc.org<mailto:mmaunder at iattc.org>

Visit the AD Model Builder project at

See the following website for information on fisheries stock assessment

From: users-bounces at admb-project.org [mailto:users-bounces at admb-project.org] On Behalf Of Campbell, Alex
Sent: Thursday, May 19, 2011 6:15 PM
To: users at admb-project.org
Subject: Re: [ADMB Users] 10.1 ic > imax

admb 10.0 and 9.1 on linux give me the same behaviour. so not a version thing. one day "soon" i'll find time to debug..

convergence critieria is not necessarily the issue because that determines ultimate convergence, not the question of whether the process has hung

grepping "ic > imax" points me to fmmtr1.cpp and newfmin.cpp but without debugging i'm not much wiser!

From: users-bounces at admb-project.org [mailto:users-bounces at admb-project.org] On Behalf Of Campbell, Alex
Sent: Friday, 13 May 2011 4:33 PM
To: users at admb-project.org
Subject: [ADMB Users] 10.1 ic > imax

Hi folks

I've recently installed admb 10.1 on a 'real' system (SuSE Linux Enterprise Server 11 SP1, gcc 4.3) and I've noticed different behaviour vs my 32-bit admb 10.0 windoze setup. Specifically the ic > imax is minimum attained issue pops up on the 10.1 where it does not on the 10.0. Both installations give me the same parameter estimates, but obviously a) something is different, b) it appears to be worse in the newer version and c) it would be nice to know why. The first thing that came to mind is that the default value of the convergence criterion might have changed between 10.0 and 10.1 but I ran the new system with -crit 1e-4 and same behaviour.

Any ideas?

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