easy to derive.
Ravi.
-Original Message-
From: r-devel-boun...@r-project.org [mailto:r-devel-boun...@r-project.org]
On Behalf Of Troy Robertson
Sent: Wednesday, October 13, 2010 1:51 AM
To: 'r-devel@R-project.org'
Subject: [Rd] Wierd nlm behaviour in 2.10.1 and 2.12.0 [Sec=Unclassified
'; 'r-devel@R-project.org'
Subject: Re: [Rd] Wierd nlm behaviour in 2.10.1 and 2.12.0
[Sec=Unclassified]
Hi Troy,
I think that your problem is poorly scaled. You have variables that vary
over several orders of magnitude. This means that any small changes (due to
subtle differences between R versions
Varadhan'; Troy Robertson; 'r-devel@R-project.org'
Subject: RE: [Rd] Wierd nlm behaviour in 2.10.1 and 2.12.0
[Sec=Unclassified]
Try this:
Myfunc2 - function(rootM,Abund,Loss,OtherM) {
# I have scaled the function
(Loss/Abund - (rootM/(rootM+OtherM)*
(1-exp(-(rootM+OtherM)^2
}
nlm
, October 13, 2010 9:08 pm
Subject: RE: [Rd] Wierd nlm behaviour in 2.10.1 and 2.12.0 [Sec=Unclassified]
To: 'Ravi Varadhan' rvarad...@jhmi.edu, 'r-devel@R-project.org'
r-devel@r-project.org
Thanks heaps Ravi,
I will have to take the modified function to my modeller/statistician
and get him
Hi all,
When upgrading to 2.11.1 recently I noticed different results being produced by
my code.
After much digging I have finally narrowed it to a call to nlm().
This can be replicated by:
FixedRemovals-1836180125888
AbStageInitial-2223033830403
Rates- 0.3102445
Hi all,
When upgrading to 2.11.1 recently I noticed different results being produced by
my code.
After MUCH digging into my code I have finally narrowed it to a call to nlm().
The problem actually occurs in 2.10.1 and 2.12.0.
This can be replicated by trying the code below in some different
