Displaying 11 results from an estimated 11 matches for "controlvals".
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2006 Jul 23
1
How to pass eval.max from lme() to nlminb?
Dear R community,
I'm fitting a complex mixed-effects model that requires numerous
iterations and function evaluations. I note that nlminb accepts a
list of control parameters, including eval.max. Is there a way to
change the default eval.max value for nlminb when it is being called
from lme?
Thanks for any thoughts,
Andrew
--
Andrew Robinson
Department of Mathematics and Statistics
2011 Mar 12
0
"Ran out of iterations and did not converge"
Hello R users,
I'm trying to do simulations for comparing cox and weibull
I have come across this problem:
Warning messages:
1: In survreg.fit(X, Y, weights, offset, init = init, controlvals = control,
:
Ran out of iterations and did not converge
2: In survreg.fit(X, Y, weights, offset, init = init, controlvals = control,
:
Ran out of iterations and did not converge
what i did is fallowing
simulasyon<-function(x,oran){
+ y<-rexp(length(oran),rate=oran)
+ z<-rexp(lengt...
2011 Mar 10
2
tobit regression model
...s of
the code that don't have a Stata license.
The code is:
require(AER)
left = 3.218476
x = c(0,6,12,18)
y = c(10.065819,7.803843,5.164786,3.218476)
mod<-tobit(y~x, left = left, right = Inf)
This gives back the following warning:
Warning in survreg.fit(X, Y, weights, offset, init = init, controlvals =
control, :
Ran out of iterations and did not converge
Has anyone come across this problem before or know a way to fix the problem?
Thanks in advance,
Jennifer
--
View this message in context: http://r.789695.n4.nabble.com/tobit-regression-model-tp3345789p3345789.html
Sent from the R help mai...
2004 May 05
0
Lme4 error
What's happening?
> Celpe.Mixed <- lme(Nota~Tarefa + Corretor %in%
Tarefa,random=~1|ID,data=Celpe.Dados11)
Error in "EMsteps<-"(`*tmp*`, value = controlvals) :
error code 6 from Lapack routine dtrtri
>
I've trying to fit a Mixed model using lme from package lme4 and the error
above has occourred. What Should I Do to solve this?
Best regards
[]s
Leonard Assis
EstatÃstico / CONFE 7439
UIN : 41-764-523 / Skype : lmassis / msn : lmass...
2007 May 11
0
Tobit model and an error message
...2.1 I-likelihood = -20098.2
Degrees of freedom for terms= 0.5 0.4 1039.4
Likelihood ratio test=232877 on 1039 df, p=0
n=4840 (57 observations deleted due to missingness)
Warning message:
Inner loop failed to coverge for iterations 2 in: survpenal.fit(X, Y, weights, offset, init = init, controlvals = control,
>
Could you please help me in finding the error in my code (if any) so that I will not get this error message? I would really appreciate if you could help me in this regard.
Thank you so much.
Sincerely,
Sattar
_________________________________________________________...
2007 Jun 26
1
survreg error
...ly generated from a
Weibull distribution and the model parameters estimated. When this is
embedded within a loop and the process repeated for different datasets, the
program aborts after a few runs in most cases giving the following message:
Error in survreg.fit(X, Y, weights, offset, init = init, controlvals =
control, :
NA/NaN/Inf in foreign function call (arg 9)
In addition: Warning message:
no non-missing arguments to max; returning -Inf
I'm having similar problems when using the lognormal distribution as well.
Does anyone have any suggestions\thoughts on how to circumvent this issue?...
2007 Jun 27
0
error message survreg.fit
...For reasons that are not important here now, I wanted to look for the
effects of 'randomly' re-allocating event types to the lifetime data.
However, when I did this (keeping everything else the same), R returned
this error message:
Error in survreg.fit(X, Y, weights, offset, init = init, controlvals =
control, : NA/NaN/Inf in foreign function call (arg 9)
I am puzzled by this error message and can't find anything in the
archives etc.
Your input would be greatly appreciated.
Best regards, Michael
Michael Drescher
Ontario Forest Research Institute
Ontario Ministry of Na...
2011 Jan 28
1
survreg 3-way interaction
> I was wondering why survreg (in survival package) can not handle
> three-way interactions. I have an AFT .....
You have given us no data to diagnose your problem. What do you mean
by "cannot handle" -- does the package print a message "no 3 way
interactions", gives wrong answers, your laptop catches on fire when you
run it, ....?
Also, make sure you read
2003 Aug 26
1
Getting out of an embedded function safely - use try?
Helpers.
An instrument sends me data that is mostly nonlinear. I have a group of
functions to manipulate this data so that it is useful to the user. One
of them involves a nls model that called to fit a line to the data and
returns the fits. This works well 99 out of 100 times. Occasionally, the
sensor sends some bad data to which a nls model cannot be fit. When that
happens, the nls function
2004 Nov 23
2
Convergence problem in GLMM
Dear list members,
In re-running with GLMM() from the lme4 package a generalized-linear mixed
model that I had previously fit with glmmPQL() from MASS, I'm getting a
warning of a convergence failure, even when I set the method argument of
GLMM() to "PQL":
> bang.mod.1 <- glmmPQL(contraception ~ as.factor(children) + cage + urban,
+ random=~as.factor(children) + cage +
2009 Aug 07
1
Bug in nlm, found using sem; failure in several flavors (PR#13883)
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Hi Jeff,
=09As mentioned in my message, I *did* replicate on another platform.=20
One platform was