Displaying 20 results from an estimated 24 matches for "maxlik".

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malik

2009 May 16

1

maxLik pakage

Hi all;
I recently have been used 'maxLik' function for maximizing G2StNV178 function with gradient function gradlik; for receiving this goal, I write the following program; but I have been seen an error in calling gradient function;
The maxLik function can't enter gradlik function (definition of gradient function); I guess my mi...

2020 Oct 08

0

[External] Re: unable to access index for repository...

...models the newer R would converge with not-so-nice gradients while R-3.0.3 would still do nicely (good gradient). I use numerical graduent of course. I wonder whether numerical gradient routine were revised at the time of transition from R-3.0.3 to newer. Not knowing how different your versions of maxLik are between, I will try as I said I would, that is, use new version of maxLik from old R and vice versa, and see what happens.
Sent from my iPhone
Beware: My autocorrect is crazy
> On Oct 9, 2020, at 4:28 AM, Arne Henningsen <arne.henningsen at gmail.com> wrote:
>
> ?Hi Steven
>...

2009 May 11

1

maxLik package

Hi all.
Recently i have been used maxlik package for optimizing a function with 5 parameters but i couldn't define gradient argument in function maxLik;
How i can define a command to receive my goal? Whether I can change the core of this package?
Thanks for your attention and reply
A. kheradmandi
[[alternative HTML versi...

2020 Oct 08

2

[External] Re: unable to access index for repository...

Hi Steven
Which optimisation algorithms in maxLik work better under R-3.0.3 than
under the current version of R?
/Arne
On Thu, 8 Oct 2020 at 21:05, Steven Yen <styen at ntu.edu.tw> wrote:
>
> Hmm. You raised an interesting point. Actually I am not having problems with aod per se?-it is just a supporting package I need while using...

2020 Oct 09

1

[External] Re: unable to access index for repository...

...really post *reproducible* code giving
evidence to your claim.
As was mentioned earlier, the difference may not be in R, but
rather in the versions of the (non-base R, but "extension") R
packages you use; and you were saying earlier you will check
that (using the old version of the 'maxLik' package with a newer
version of R and vice verso) and tell us about it.
Thank you in advance on being careful and rational about such
findings.
With regards,
Martin Maechler
ETH Zurich and R core team
> Not knowing how different your versions of maxLik are
> between, I will...

2020 Oct 08

0

[External] Re: unable to access index for repository...

Hmm. You raised an interesting point. Actually I am not having problems with aod per se?-it is just a supporting package I need while using old R. The essential package I need, maxLik, simply works better under R-3.0.3, for reason I do not understand?specifically the numerical gradients of the likelihood function are not evaluated as accurately in newer versions of R in my experience, which is why I continue to use R-3.0.3. Because I use this older version of R, naturally I need...

2008 Mar 07

0

Packages micEcon, sampleSelection, and maxLik

Dear R Users:
We have splitted up the micEcon package into three packages:
a) Package "maxLik" provides tools for maximum likelihood estimations
(see http://www.maxLik.org).
b) Package "sampleSelection" provides tools for estimating Heckman-type sample
selection/generalized tobit models (see http://www.sampleSelection.org).
c) Package "micEcon&quo...

2008 Mar 07

0

Packages micEcon, sampleSelection, and maxLik

Dear R Users:
We have splitted up the micEcon package into three packages:
a) Package "maxLik" provides tools for maximum likelihood estimations
(see http://www.maxLik.org).
b) Package "sampleSelection" provides tools for estimating Heckman-type sample
selection/generalized tobit models (see http://www.sampleSelection.org).
c) Package "micEcon&quo...

2011 Apr 10

0

maxLik package.

Dear Sir/ Madam,
I have some enquiry in R about maxLik package where, in this package we have the
usage
maxLik(logLik, grad, hess, start, method, iterlim, print.level) when I used
this with print.level equals to 3 I could have estimates of parameters at each
iteration but I do not know how can I call the information in the level. Is
there any wa...

2012 Dec 20

1

Problem with simulation

.... Sometimes for 100 iteration, my
program works but sometimes give error message regarding some "built-in
function" which I never used
in my code. I have no idea about the problem. Any suggestion, comments or
idea regarding this would be highly appreciable. Thanks.
I have used ---- "maxLik()" and "BBsolve()" in my code. Error message shows
regarding "optim()".
Best regards.
--
Rajibul Mian
Grad Student, Maths & STATS,
UWindsor, Canada.
https://sites.google.com/site/rajibulmian/
[[alternative HTML version deleted]]

2009 Apr 03

2

Geometric Brownian Motion Process with Jumps

Hi,
I have been using maxLik to do some MLE of Geometric Brownian Motion Process and everything has been going fine, but know I have tried to do it with jumps. I have create a vector of jumps and then added this into my log-likelihood equation, know I am getting a message:
NA in the initial gradient
My codes is hear
#
n<...

2004 Jan 20

0

nlminb function

Hello,
I've got a program written in S-plus which I think is converted successfully to R with the exception of part of the opt.param function written.
In S-plus it is:
nlminb(start=x0, obj=negllgamma.f, scale=1, lower=c(0.01,0.0001),
upper=c(10,0.9999), gamma=gamma, maxlik=maxlik,
y=ldose, s=lse, max.iter = 1000, max.fcal = 1000)$par
and so far with R I've got to:
optim(par=x0, fn=negllgamma.f, method="L-BFGS-B", lower=c(0.01,0.0001),
upper=c(10,0.9999), gamma=gamma, maxlik=maxlik,
y=ldose, s=lse, control=list(maxit = 1000))$par
howeve...

2020 Oct 08

2

[External] Re: unable to access index for repository...

...that important to you. Such is the nature of volunteer-developed open source software... so support your local experts.
>
> On October 8, 2020 10:22:54 AM PDT, Steven Yen <styen at ntu.edu.tw> wrote:
> >Thanks for the help. I have a reason to continue with R-3.0.3. I used
> >maxLik to estimate econometric models and some of them are better
> >handled with R-3.0.3 (but not later)----a sad reality I do not like.
> >
> >Here is what I did. I downloaded
> >
> >https://cran-archive.r-project.org/bin/windows/contrib/3.0/aod_...

2011 Dec 04

3

Prediction from censReg?

Hi -
First post, so excuse any errors in protocol:
Wanted to ask if there's an easy way to use 'predict' with objects of class
'censReg', 'maxLik', 'maxim' or 'list'.
Have a left-censored dataset, attempting to use a Tobit model and am working
with the censReg package. I like how easy it is to move from glm models to
predictions with 'predict' and wanted to ask if there was a way to do so
with objects output from...

2013 Apr 24

1

pglm package: fitted values and residuals

I'm using the package pglm and I'have estimated a "random probit model".
I need to save in a vector the fitted values and the residuals of the
model but I can not do it.
I tried with the command fitted.values using the following procedure
without results:
library(pglm)
m1_S<-pglm(Feed ~ Cons_PC_1 + imp_gen_1 + LGDP_PC_1 + lnEI_1 +

2020 Oct 08

2

unable to access index for repository...

Thanks for the help. I have a reason to continue with R-3.0.3. I used
maxLik to estimate econometric models and some of them are better
handled with R-3.0.3 (but not later)----a sad reality I do not like.
Here is what I did. I downloaded
https://cran-archive.r-project.org/bin/windows/contrib/3.0/aod_1.3.zip
and installed the zip file, which w...

2020 Oct 08

0

unable to access index for repository...

...if this issue is that important to you. Such is the nature of volunteer-developed open source software... so support your local experts.
On October 8, 2020 10:22:54 AM PDT, Steven Yen <styen at ntu.edu.tw> wrote:
>Thanks for the help. I have a reason to continue with R-3.0.3. I used
>maxLik to estimate econometric models and some of them are better
>handled with R-3.0.3 (but not later)----a sad reality I do not like.
>
>Here is what I did. I downloaded
>
>https://cran-archive.r-project.org/bin/windows/contrib/3.0/aod_1.3.zip
>
>and ins...

2009 Jun 10

0

License quandry in the Fedora sub-space of all R packages

...) R-fUtilities
GPL-2 R-gam
GPL-2 R-gdata
GPL (>= 2) R-geoR
GPL-2 R-gplots
GPL (>= 2) R-Hmisc
GPL (>= 2) R-igraph
GPL (>= 2) R-kinship
GPL (>= 2) R-leaps
GPL-2 R-lmtest
GPL-2 R-maps
GPL (>= 2) R-maptools
GPL (>= 2) R-maxLik
GPL (>=2) R-mlogit
GPL-2 R-mvtnorm
GPL-2 R-oz
GPL (>= 2) R-PBSmapping
GPL (>= 2) R-plm
GPL-2 R-pscl
GPL-2 R-quadprog
GPL (>= 2) R-quantreg
GPL-2 R-Rglpk
GPL-2 R-RMySQL
GPL (>= 2) R-robustbase
GPL-2 R-Rsymphony
GPL-2 R-RUnit
GPL (...

2008 Jun 08

2

optim, constrOptim: setting some parameters equal to each other

Hello, and apologies for the upcoming naive questions. I am a biologist who is trying to teach himself the appropriate areas of math and stats. I welcome pointers to suggested background reading just as much as I do direct answers to my question.
Let's say I have a function F() that takes variables (a,b,c,a1,b1,c1) and returns x, and I want to find the values of these variables that result in

2020 Oct 08

0

unable to access index for repository...

Don't choose a mirror. That will override the repos choice.
Do update R to a current version if you aren't able to debug this
yourself.
Duncan Murdoch
On 08/10/2020 12:38 p.m., Steven Yen wrote:
> Sorry Gentlemen and all. Now this is becoming a joke (to me). I repeated
> what I did earlier, with and without the option to set repos suggested
> by Duncan. Now it does