Displaying 20 results from an estimated 1000 matches similar to: "2 questions regarding base-n and identifing digits"
2003 Feb 07
1
a question regarding s-plus libraries and R
Hi!
I am a relatively new user of R and I use it to prepare my dissertation. I
have come to some very usefull and specific libraries written for S-PLUS 4
and would like to use them in R. Is that possible? I just found out that one
of these libraries has already been transfered to R, while 3 others have
not. For the matter of beeing more exact I''m interested in the dealing with
missing
2003 Sep 06
1
automatic model specification
Dear listers,
I must first say that all the suggestions and help I
got from the list so far was of great help to my work.
I approach you with another question. Is it possible
to generate an automatic specification of the formula
for lme (or other models in R)? Let me clarify. I'm
using models in a simulation run and can have variable
number of variables in the data. I would like to
generate
2003 Sep 30
2
FW: error predicting values from the LME
HI all,
I might add some more information in order to possibly solve my problem. I'm
really stuck and no obvious solutions do the trick.
I'm using R 1.7.1 on Windows 2000 with the packages regurarly updated.
I'm using hypothetical data constructed as a pseudo population conforming to
a certain Var-Cov structure.
I might add that just
> predict(level2)
works. But when I add the
2003 Jun 25
2
within group variance of the coeficients in LME
Dear listers,
I can't find the variance or se of the coefficients in a multilevel model
using lme.
I want to calculate a Chi square test statistics for the variability of the
coefficients across levels. I have a simple 2-level problem, where I want to
check weather a certain covariate varies across level 2 units. Pinheiro
Bates suggest just looking at the intervals or doing a rather
2003 Sep 03
1
glmmPQL probelm
Dear listers,
First let me appologize if the same mail arrives multiple times. Recently I
had some probelms sending my e-mails to the list.
I encountered a problem when running glmmPQL procuedure doing multilevel
modeling with a dichotomous outcome.
Those are the two error messages I usually get:
Error in logLik.reStruct(object, conLin) :
NA/NaN/Inf in foreign function call (arg 3)
2004 Feb 09
10
PhD student reading list, suggestions wanted
I've got a PhD student starting this year.
She'll be working on data mining.
She has asked for a reading list while she's still in her home
country, which is a really good sign.
Her cosupervisor and I don't (think we) have any problem with
choosing things that are specifically about data mining, but
there are some statistical ideas (sampling, exploratory-vs-confirmatory,
2003 Oct 02
8
r editors
Hi ,
I am programming on a windows system and have problems
using notepad which is my main editor.Each time I try
to open the editor from the R IDE, R crashes.
So I always have to copy my codes from notepad and
paste in R to run them.
CAn someone tell me if I am doing anything wrong or is
there a better editor(freeware) which I could get.
thanks
cilver
=====
=====================
Sylvie B.
2003 Oct 25
0
memory optimization and use of recursion
Hi listers,
In light with the recent discussion on the optimizing the use of memory in
straneous proceudres i present you m problem, and hope to some additional
ideas.
I'm running a simualtion that in each step uses quite an amount of memory
(but not exceedingly) - just to give you an idea - I create a pseudo
population (n=1000, m=3) run lme and lm model and multiply impute (M=5) and
do the
2003 Sep 29
0
predicting values from the LME
Dear listers,
I experinced a problem prdicting the values using the LME with multilevel
data.
I have NA's in my dependent variable and the model is fitted only on the
completed cases.
I want to estimate the predicted values for the rest of the data (those
cases with missing dep. variable)
I extracted a subset from the original file containing the variables used in
the model as well as the
2004 Feb 08
0
bootstrap estimates for lme
Dear listers,
I would like to get the bootstrap estimates form my lme model.
I have an HLM (multillevel) 2-level model with the dichotomous outcome. I
used glmmPQL procedure. However I have a problem since I have a rather
unbalanced proportion (90-99% of events, i.e. ones and only 1-10% of
nonevents - zeros) although sample sizes are not that small between 500 and
1000 I get pretty weird and
2004 Feb 10
4
The ttest.c example in R under MS Windows
We are trying to compile and run the ttest.c example that comes with R (in
C:\Program Files\R\rw1081\src\library\windlgs\src\ttest.c). After compiling
it with MS Visual C++ we load the DLL with dyn.load.
So far it seems good, but when we try to call it from R (after running
C:\Program Files\R\rw1081\src\library\windlgs\R\windlgs.R) R crashes.
We have tried changing the exports from DLL but have
2003 May 11
1
NLME - multilevel model using binary outcome - logistic regression
Hi!
I'm pretty raw when working with the R models (linear or not).
I'm wondering has anybody worked with the NLME library and dichotomous
outcomes.
I have a binary outcome variable that I woul like to model in a nested
(multilevel) model.
I started to fit a logistic model to a NLS function, but could not suceed. I
know there are better ways to do it in R with either the LRM or GLM wih
2005 Jan 31
1
share mounted MANY times...
I've been searching for a solution to this problem for a few hours now, but google searches are coming up empty. I have 3 Linux boxes all running Suse 9.1 and samba 3.0.2a. The 3 systems are:
Novi - the samba server
Newberry - mounting novi
Sagola - mounting novi
This work great, until "mount -a" is run. Each time mount -a is run, we get another mount of novi. When I type
2006 Jul 26
2
Branching on 'grep' returns...
Greetings, all.
I'm fiddling with some text manipulation in R, and I've found
something which feels counterintuitive to my PERL-trained senses; I'm
hoping that I can glean new R intuition about the situation.
Here's an example, as concise as I could make it.
trg<-c("this","that")
# these two work as I'd expected.
if ( grep("this",trg) ) {
2008 Oct 07
2
Cisco 7906g & SIP
Hi, I have a problem with Cisco 7906G and SIP protocol use with Asterisk
1.2.26.
I have uploaded in my tftp server the firmware
'cmterm-7911_7906-sip.8-0-4SR1' that use 'SIP11.8-0-4SR1S.loads' and in
SEPmacaddress.cnf.xml I have:
<loadInformation>SIP11.8-0-4SR1S</loadInformation>
..but in tftp log server I have:
Oct 07 11:56:22 asterisk1.local
2005 Apr 28
11
Three NIC problem
Hi!
I have setup a router with 3 NIC:
inet->eth0->eth1-local_users
->eth2-DMZ_server
I have also setup dhcp and DNS on the router. DHCP is server only for eth1
while on eth2 I have static IP address. So everything works except
connecting local_users on eth1 to Samba shares on the server in DMZ by
server name. Yes, I have it in my DNS records to point to it and with
nslookup
2017 Aug 22
4
boot.stepAIC fails with computed formula
I'm trying to use boot.stepAIC for feature selection; I need to be able to specify the name of the dependent variable programmatically, but this appear to fail:
In R-Studio with MS R Open 3.4:
library(bootStepAIC)
#Fake data
n<-200
x1 <- runif(n, -3, 3)
x2 <- runif(n, -3, 3)
x3 <- runif(n, -3, 3)
x4 <- runif(n, -3, 3)
x5 <- runif(n, -3, 3)
x6 <- runif(n, -3, 3)
x7
2005 May 12
5
Redirect question
Hi!
I want to redirect all http and https traffic from my LAN to squid in DMZ -
transparent proxy.
How do I do that?
Regards,
Sasa
2017 Aug 23
3
boot.stepAIC fails with computed formula
Until I get a fix that works, a work-around would be to rename the 'y1' column, used a fixed formula, and rename it back afterwards.
Thanks for your help.
SGO.
-----Original Message-----
From: Bert Gunter [mailto:bgunter.4567 at gmail.com]
Sent: 22 August 2017 20:38
To: Stephen O'hagan <SOhagan at manchester.ac.uk>
Cc: r-help at r-project.org
Subject: Re: [R] boot.stepAIC
2017 Aug 23
0
boot.stepAIC fails with computed formula
It seems that if you build the formula as a character string, and
postpone the "as.formula" into the lm call, it works.
instead of
frm1 <- as.formula(paste(trg,"~1"))
use
frm1a <- paste(trg,"~1")
and then
strt <- lm(as.formula(frm1a),dat)
regards,
Heinz
Stephen O'hagan wrote/hat geschrieben on/am 23.08.2017 12:07:
> Until I get a fix that works, a