Chandra,
you might want to have a look at package flexclust.
Best,
Bettina
Ranga Chandra Gudivada wrote:
I am trying to cluster some binary data using k-means . As the regular
kmeans available from stats package in R does'nt provide the option to
change the distance method. I was wondering
?system.time
might be what you're looking for.
Ted.
Mohammad Ehsanul Karim wrote on 04/23/2007 03:53 PM:
Dear List,
I want to let R calculate the time (run-time) it
requires to run a self-written simulation function. I
tried as follows: it
enables me to see the starting and finishing
Tong Wang wrote:
Hi All,
Here 's what I got using dgamma function :
nu-.2
nu*log(nu)-log(gamma(nu))+(nu-1)*log(1)-nu*(1)
[1] -2.045951
dgamma(1,nu,nu,1)
[1] 0.0801333
dgamma(1,nu,nu,0)
[1] NaN
Warning message:
NaNs produced in: dgamma(x, shape,
The following seem to work:
begin.time-Sys.time()
begin.times - format(begin.time, %a %b %d, %Y at
%X)
end.time-Sys.time()
end.times - format(end.time, %a %b %d, %Y at %X)
run.time-difftime(end.time,begin.time,units=secs)
cat( Start time:, begin.times , \n, Finish
time:, end.times, \n, Run
On 22-Apr-07 20:51:09, Jeffrey Miller wrote:
I read the reply earlier in which Nima was naughty-naughty'd
for calling us a Help Desk. And, I have to admit that I agree.
Well, we're not a Help Desk of the kind that puts you on hold,
listening to the Free Software Song[1] round and round ... but
On Fri, 2007-04-20 at 12:13 -0400, Fred Bacon wrote:
Ideally, it would work like this:
The free VMware player is installed on each of the lab computers.
The lab manager uses a licensed copy of VMware Workstation to create
a clean image of a computer.
You can use the open
DEEPANKAR BASU wrote:
I am trying to maximise a complicated loglikelihood function with the optim
command. Is there some way to get to know the estiamtes at each iteration?
When I put control=list(trace=TRUE) as an option in optim, I just got the
initial and final values of the
2. I do most of my work in R using Emacs and ESS. That means that I
keep a file in an emacs window and I submit it to R one line at a
time or one region at a time, making corrections and iterating as
needed. When I am done, I just save the file with the last,
working, correct
Dear Nitish,
Please do *NOT* resend your message several times to the R-help
mailing list.
This is considered very impolite.
Nitish == Nitish Kumar Mishra [EMAIL PROTECTED]
on Sun, 22 Apr 2007 16:39:03 +0530 (IST) writes:
Nitish Hi, I am simply asking about coefficient od
Benoît Lété wrote:
Hello,
I have an elementary question (for which I couldn't find the answer on the
web or the help): how can I extract the mode (modal score) of a vector?
Assuming that your vector contains only integers:
v - sample(1:5, size=20, replace=T)
v
[1] 1 1 1 1 2 3 5 1 1 5
Dear all,
I found most of R packages do stepwise model selection with AIC criterian. I
am doing a study on the comparison of severy popular model selection methods
including stepwise using p-value criterian. We know that in SAS the stepwise
uses p-value criterian, so this method could be a
hello,
I'd like know how to do to extract data from a frame for example
how can I do to extract only the data where variety=victory or variety=golden
rain
thanks.
Oats
Block Variety nitro yield
1 I Victory 0.0 111
2 I Victory 0.2 130
3 I Victory 0.4
Hi R-wizards,
I ran a random forest on a dataset where the response variable had two
possible values. It returned a warning telling me that it did regression and
if that was really what I wanted.
Does anybody know what is being in terms of the algorithm when it does a
regression? (the random
Oats[Oats$Variety %in% c(Victory, Golden Rain),]
or
subset(Oats, Variety %in% c(Victory, Golden Rain))
Stefano
-Messaggio originale-
Da: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] conto di elyakhlifi
mustapha
Inviato: lunedì 23 aprile 2007 9.56
A: R-help@stat.math.ethz.ch
Oggetto: [R]
Hi R experts,
I have a data recoding problem I cant get my head around - I am not that
great at the subsetting syntax. I have a dataset of longitudinal
toxicity data (for multistate modelling) for which I want to also want
to do a simple Kaplan-Meier curve of the time to first toxic event.
The
Hi,
I'd like know how to do to extract data from a frame for example
how can I do to extract only the data where variety=victory or variety=golden
rain
thanks.
Oats
Block Variety nitro yield
1 I Victory 0.0 111
2 I Victory 0.2 130
You can try :
one option is the following:
do.call(rbind, lapply(split(tox, tox$id), function (x) {
if (any(ind - x$event == 1))
x[which(ind)[1], ]
else
x[nrow(x), ]
}))
I hope it helps.
Best,
Dimitris
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public
hi,
ok I understand how to use the subset function but sometimes I need to use it
to extract data by date and its format it isn't so easy (like below)
for example like in using SQL I thougth that it was possible to write %/2004
but it doesn't run. Can you help me please about this?
subset(don,
On 23-Apr-07 04:41:03, ecatchpole wrote:
dgamma(x=1, shape=nu, rate=nu, log=TRUE)
[1] -2.045951
This is a good example of why you should call parameters by name.
Ted.
True up to the point that the log parameter is in the 5th
position in the list of dgamma paramaters, so if its value is
Hi all,
it there any possibility to draw colored shading lines of a polygon plot?
E.g.
plot(polygon_object,col=red,density=10,angle=45)
produces only black shading lines within the polygon.
With many thanks for any hint
Albrecht
__
Sorry if this answer was already given, or if I miss the point,
but did you have a look to lowerTriangle and upperTriangle functions
in the gdata package ?
# example
# A-matrix(rnorm(9),3,3)
# B-B-matrix(NA,dim(A)[1],dim(A)[2])
# lowerTriangle(B)-lowerTriangle(A)
#
Hello,
I have a problem with the princomp method, it seems stupid but I don't know
how to handle it.
I have a dataset with some regular data and some outliers. I want to
calculate a PCA on the regular data and get the scores for all data,
including the outliers. Is this possible on R?
Thank you
On Mon, 23 Apr 2007, annina wrote:
Hello,
I have a problem with the princomp method, it seems stupid but I don't know
how to handle it.
I have a dataset with some regular data and some outliers. I want to
calculate a PCA on the regular data and get the scores for all data,
including the
Dear Sir
I am running a script file for fortran but it showing error i.e.
.sgb.x : /sbin/loader: Fatal Error : cannot map libm_c32.so
here sgb.x is its output file that I have got after running make file.
I have seached this library file inside /usr/shlib directory its not there.
Please tel
Hi Annina,
You may use the dudi.pca function in the ade4 package.
PCA - dudi.pca(your_data, scale = FALSE, scan = FALSE)
# to get scores
PCA$li
and you're done. Maybe have a look at ?dudi.pca
Christophe
annina a écrit :
Hello,
I have a problem with the princomp method, it seems stupid but
Ruben,
Maybe your binary response is a numeric vector - try converting it into
a factor with two levels. You probably want classification rather than
regression (the dependent variable should be numeric and continous)!
Arne
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL
Hi Nitish,
R^2 cannot take values of greater than 1.
Per definition (see
http://en.wikipedia.org/wiki/Coefficient_of_determination)
R^2 := 1- SSE/SST
whereby
SSE = sum of squared errors
SST = total sum of squares
For R^2 1 would require SSE/SST 0.
Since SSE and SST are non-negative (check
Hello,
is there a way to use the aggregate function to calculate monthly mean
in case i have one row in data frame that holds the date like
-mm-dd? i know that it works for daily means. i also like to do it
for monthly and yearly means. maybe there is something like aggregate(x,
Hello there
someone who knows this?
im having some trouble with making a function that comes out with what
i want.
i have these vectors:
x1 - factor(rep(1:2500,3*10))
x2 - factor(rep(1:25000,3))
x3 - factor(1:75000)
y - rep(rnorm(2500,mean=0,sd=2),10*3)+
Hi,
I have a set of dataframes names AINDSLIM, BINDSLIM, CINDSLIM ... NINDSLIM
In each dataframe I want to extract two variables, pid and {w}region,
where {w} means a, b, c, ...n
At the moment my code looks like:
PidRegion - data.frame(pid=XWAVEID$pid)
this.region -
Quoting [EMAIL PROTECTED]:
Dear all,
I have a question about limmaGUI that is usually run in R environment.
My problem is loading data into the programm. I have 6 gpr files that
apparently are not compatible with limma. Everytime I'm trying to load
the data (including a RNA targets file, an
Good morning,
I keep copies my .RData file in different directories for different projects on
Windows XP. There is an icon on my desktop for each project so all I have to
do is click on the icon to open R for a specific project, i.e. a specific
.RData file. How do I change to another .RData
Walter Paczkowski wrote:
Good morning,
I keep copies my .RData file in different directories for different projects
on Windows XP. There is an icon on my desktop for each project so all I have
to do is click on the icon to open R for a specific project, i.e. a specific
.RData file.
?setwd
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Walter Paczkowski
Sent: Monday, April 23, 2007 7:41 AM
To: r-help@stat.math.ethz.ch
Subject: [R] Changing working directory
Good morning,
I keep copies my .RData file in different directories for
Hi,
I need to add some different curves to a each panel in a xyplot. I have a old
function to make this using panel.number, like this:
panel=function(x,y,panel.number,...){
panel.xyplot(x,y,...)
if(panel.number==1){
try this. The first group of lines recreates your data frame, DF, and
the last line is the aggregate:
Input - DateTimez
2006-01-01 21:00 6,2
2006-01-01 22:00 5,7
2006-01-01 23:00 3,2
2006-01-02 00:00 7,8
2006-01-02 01:00 6,8
2006-01-02
Consider sapply and get.
There might be something like the following (untested)
fn-function(l){ # l is supposed to be a letter. Errors will occur
otherwise.
#constructing names
dfr.name-paste(toupper(l),INDSLIM,sep=)
column.name-paste(tolower(l),region,sep=)
#retrieving data from the
Have you looked on the 'File' menu?
'Load Workspace...' is what you need, possibly after 'Change dir...'
On Mon, 23 Apr 2007, Walter Paczkowski wrote:
Good morning,
I keep copies my .RData file in different directories for different
projects on Windows XP. There is an icon on my desktop
Hi,
you seem to have mixed 2 different things:
1) changing a working directory - see ?setwd, ?getwd
However, this will NOT load another .Rdata file.
2) loading data - see ?load and ?save, ?save.image - loading new data
image will erase all currently stored objects.
Petr
Walter Paczkowski
Thankyou for your reply Gabor.
Your code helped me get started in creating id for each week of month. What
I'm really looking for though is a more general application where I can
extract each final week of the month conditional on the pattern of values
(simply plus or minus signs) of the
--- Gabor Grothendieck [EMAIL PROTECTED]
wrote:
Just one caveat. I personally would try to avoid
using
global options since it can cause conflicts when
two different programs assume two different settings
of the same global option and need to interact.
I see this argument often, and
M Karim asked about the difference between
coxme(..., random= ~1|id) and
coxph( ... frailty(id, dist='gauss')
1. coxme is the later routine, with more sophisticated and reliable
optimization, and a wider range of models. If I get the abstract done in
time, there will
annina wossona at yahoo.co.uk writes:
Hello,
I have a problem with the princomp method, it seems stupid but I don't know
how to handle it.
I have a dataset with some regular data and some outliers. I want to
calculate a PCA on the regular data and get the scores for all data,
including
Rubin,
I'm assuming you really do want to do a classification?
check out
?factor
I'm guessing you have coded MMS_ENABLED_HANDSET as 0, 1; or some such
numeric coding.
suggest you do:
dat$MMS_ENABLED_HANDSET - factor(dat$MMS_ENABLED_HANDSET)
to force your response variable to be a factor (AKA
Ted Harding wrote:
but, in the meanwhile, perhaps we need a revision of Ayn Rand's
Virtue of Selfishness and how it may or may not extend to the
open-source community.
Ayn Rand's concept of selfishness is of course not the standard
one (gratifying oneself in disregard for others), and
Just change f appropriately, e.g.
f - function(x) {
v - embed(x$Sign, 4) %*% c(0, 1, -1, 1) == 3
if (any(v)) x[which.max(v) + 3, ]
}
On 4/23/07, Alfonso Sammassimo [EMAIL PROTECTED] wrote:
Thankyou for your reply Gabor.
Your code helped me get started in creating id for each
A place where factors really are a pain is when the patient id is a
character
string. When, for instance, you subset the data to do an analysis of only
the females, having the data set `remember' all of the male id's (the original
levels) is non-productive in dozens of ways. For other
See:
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/90294.html
On 4/23/07, Ronaldo Reis Junior [EMAIL PROTECTED] wrote:
Hi,
I need to add some different curves to a each panel in a xyplot. I have a old
function to make this using panel.number, like this:
hello,
I wanna print something like this
Class Levels Values
Id_TrT1 1 2
Id_Geno764208 64209 64210 64211 64212 64213
64214
Id_Rep 2 12
Is it possible?
I have some problem I think taht
On Mon, 23 Apr 2007, Terry Therneau wrote:
--- Gabor Grothendieck [EMAIL PROTECTED]
wrote:
Just one caveat. I personally would try to avoid
using
global options since it can cause conflicts when
two different programs assume two different settings
of the same global option and need to
Hello,
when I run packageStatus(), I get the following results:
packageStatus()
Number of installed packages:
ok upgrade unavailable
/home/fernando/my_library 38 0 1
/usr/local/lib/R/library 28 0 0
Number of available
it works. thanks a lot.
Gabor Grothendieck wrote:
try this. The first group of lines recreates your data frame, DF, and
the last line is the aggregate:
Input - DateTimez
2006-01-01 21:00 6,2
2006-01-01 22:00 5,7
2006-01-01 23:00 3,2
2006-01-02
Em Segunda 23 Abril 2007 10:38, Gabor Grothendieck escreveu:
See:
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/90294.html
Thanks, it work.
Inte
Ronaldo
--
As pequenas dÃvidas são aborrecidas como as moscas. As grandes, logicamente,
deveriam ser terrÃveis como os leões, e são
how about:
?str
ever considered reading an introductory text?
find some here:
http://cran.r-project.org/other-docs.html
Stefan
elyakhlifi mustapha wrote:
hello,
I wanna print something like this
Class Levels Values
Id_TrT1 1 2
Id_Geno
If you read the help page it says
Description:
Summarize information about installed packages and packages
available at various repositories, and automatically upgrade
outdated packages.
...
avail: a data frame with columns as the _matrix_ returned by
What format does your date have? This is essential here. However it must
be something like subset(yourdata, year %in% 2004) how to extract the
year from your date you must find out yourself... (depending on the
dates format...)
ever considered reading an introductory text?
find some here:
Dear all,
I have a problem that I could not solve neither with spss nor with R.
Please, excuse me if it is atrivial question but I did not find any
soultion.
I have the followig practical problem: we a product that has A, B, C
effects (we differentiated about 30) on
Hi All R Experts
I wrote this code so that all the summaries are stored in one file so that
i can try to see among them which one is most fitting.
but the results.txt file is having * ESTIMATION WITH ANALYTICAL
GRADIENT * many times i.e. 25x25 = 625
Please help in sending the summaries
You can build the data frame with:
dat - data.frame(Class=I(Id_TrT1), Levels=I(1), Values=I(2))
new.info - c(Class=Id_Geno, Levels=7 , Values=64208 64209 64210 64211
64212 64213 64214)
dat - rbind(dat, new.info)
dat
new.info - c(Class= Id_Rep , Levels=2 , Values=12)
dat - rbind(dat,
Hello everybody,
I'm using hdf5 files to store results from intermediate calculations.
These are usually part of a list, called res. As I want the hdf-files
to contain all the members of res in its top directory, I used to do
attach(res)
do.call(hdf5save, args=c(fileout=file.path(dir, ofile),
You can build the data frame with:
dat - data.frame(Class=I(Id_TrT1), Levels=I(1), Values=I(2))
new.info - c(Class=Id_Geno, Levels=7 , Values=64208 64209 64210 64211
64212 64213 64214)
dat - rbind(dat, new.info)
dat
new.info - c(Class= Id_Rep , Levels=2 , Values=12)
dat - rbind(dat,
Thank you for subscribing. You have now unsubscribed and no more messages will
be sent.
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
On 4/23/2007 10:56 AM, Sebastian Weber wrote:
Hello everybody,
I'm using hdf5 files to store results from intermediate calculations.
These are usually part of a list, called res. As I want the hdf-files
to contain all the members of res in its top directory, I used to do
attach(res)
Hi, Ruben:
fit$confusion
if you provide your test data, then you can also access the confusion
matrix of test data by
fit$test$confusion
there are details of how to use randomForest by reading:
?randomForest
HTH,
Weiwei
On 4/22/07, Ruben Feldman [EMAIL PROTECTED] wrote:
Hi,
I am trying
Hi,
I'm using R for a QTL analysis of SNP data. I was wondering if anyone
had any advice on fitting a dominance effect into the following
function;
myfun4
function (x) {
x - scan(con, nmax=169)
y - unique(x[which(!is.na(x))])
if(length(y)1) {
summary(lme(Ad ~ x, random= ~1|sire,
Hallo
You can build the data frame with:
dat - data.frame(Class=I(Id_TrT1), Levels=I(1), Values=I(2))
new.info - c(Class=Id_Geno, Levels=7 , Values=64208 64209 64210 64211
64212 64213 64214)
dat - rbind(dat, new.info)
dat
new.info - c(Class= Id_Rep , Levels=2 , Values=12)
dat -
Hi,
I came across a case where there's a discrepancy between minimum and
maximum values reported by 'summary' and the 'min' and 'max' functions:
--cut here---start-
R str(tt)
num [1:1397] 1952 1970 1976 1967 1946 ...
R summary(tt)
Min. 1st Qu.
Its not usual to represent structures in this form in R but you
can do it if you really want:
data.frame(A = letters[1:3], B = 1:3, C = I(list(2, 1:6, 9)))
Note the I (capital i) to make sure the list gets passed in asis.
On 4/23/07, elyakhlifi mustapha [EMAIL PROTECTED] wrote:
hello,
I
I read the description of the trace control parameter in ?optim and then also
looked at the examples given at the end. In one of the examples I found that
they had used trace=TRUE with the method SANN. I am using the method
BFGS and I tried using trace=TRUE too but I did not get the parameter
Here are a few options (others may have better ones):
1. Don't use shading lines. These were mainly used when color/grayscale
was not available and are less needed now. Also, sometimes the used of
shading lines causes a Moire vibration (the combination of the lines and
the physiology of the eye
Hi John and Daniel,
Thanks for your suggestions, I updated line 127 of the
sas.get function but after submitting the following
command:
c- sas.get(lib=c:\\ghan, mem=mkds0001, var=( ),
format.library=d:\\R\\R-2.4.1,
sasprog='C:\\Programmi\\SAS\\SAS 9.1\\sas.exe') (also
trying with
DEEPANKAR BASU wrote:
I read the description of the trace control parameter in ?optim and then also
looked at the examples given at the end. In one of the examples I found that
they had used trace=TRUE with the method SANN. I am using the method
BFGS and I tried using trace=TRUE too but I
Brian Ripley recently replied to a comment of mine by referring to
a function 'assignInNamespace', which I had not heard of.
Is there a good write up on name spaces in R? There are little tidbits
in the manuals on the R site, but I found nothing substative. I'd like
to understand these
UseRs,
actuar is a package for Actuarial Science. A rather preliminary
version (0.1-3) of the package has been available on CRAN since February 2006.
We now announce the immediate availability of version 0.9-2 sporting a large
number of new features.
Non actuaries behold! There can be some
Bonjours monsieurs
Je suis un ?tudient en 4eme ann?e informatique a l?universite djilali liabes
SBA ALGERIE.
Je suis entrain de pr?parer un expos? sur l?AFD et j?ai besoin d?un exemple
sous R pour bien pr?senter mon travail.
Not sure to understand your question but if by AFD you mean CDA, that is
See the article
Tierney, L. (2003): Name Space Management for R, R News 3 (1), 2-6.
Uwe Ligges
Terry Therneau wrote:
Brian Ripley recently replied to a comment of mine by referring to
a function 'assignInNamespace', which I had not heard of.
Is there a good write up on name spaces in
Sebastian P. Luque spluque at gmail.com writes:
Hi,
I came across a case where there's a discrepancy between minimum and
maximum values reported by 'summary' and the 'min' and 'max' functions:
By default summary only lists 3 significant digits ...
see ?summary
Ben Bolker
(is
Dear all R gurus,
I am really sorry if my query embraces anyone. Can anyone give me some
introductory papers or suggestions about what Random Forest is?
Thanks and regards,
- Original Message
From: Weiwei Shi [EMAIL PROTECTED]
To: Ruben Feldman [EMAIL PROTECTED]
Cc:
Deepankar,
Here is an example using BFGS:
fr - function(x) { ## Rosenbrock Banana function
+ x1 - x[1]
+ x2 - x[2]
+ 100 * (x2 - x1 * x1)^2 + (1 - x1)^2
+ }
grr - function(x) { ## Gradient of 'fr'
+ x1 - x[1]
+ x2 - x[2]
+ c(-400 * x1 * (x2 - x1 * x1) - 2 * (1 - x1),
hi,
in using glm function is it possible to extract residuals and predict values ?
___
[[alternative HTML version deleted]]
__
R-help@stat.math.ethz.ch
Dear all R gurus,
I am really sorry if my query embraces anyone. Can anyone give me some
introductory papers or suggestions about what Random Forest is?
Thanks and regards,
- Original Message
From: Weiwei Shi [EMAIL PROTECTED]
To: Ruben Feldman [EMAIL PROTECTED]
Cc:
Sebastian P. Luque [EMAIL PROTECTED] wrote:
I came across a case where there's a discrepancy between minimum and
maximum values reported by 'summary' and the 'min' and 'max' functions:
summary() rounds by default. Thus its reporting oddball values
is considered a feature, not a bug.
--
Mike
Ravi,
Thanks a lot for your detailed reply. It clarifies many of the confusions in my
mind.
I want to look at the parameter estimates at each iteration because the full
model that I am trying to estimate is not converging; a smaller version of the
model converges but the results are quite
If monthly should aggregate per -mm combination, you could try
something like
aggregate(x$z,list(cut(as.Date(x$Date),m)),mean)
for monthly aggregation and
aggregate(x$z,list(cut(as.Date(x$Date),y)),mean)
for yearly means.
If monthly aggregation should aggregate over different years
?fitted
?residuals
?glm section 'value'
Please be so kind and read the available documentation before posting...
Petr
elyakhlifi mustapha napsal(a):
hi,
in using glm function is it possible to extract residuals and predict values
?
Beno?t L?t? wrote:
Hello,
I have an elementary question (for which I couldn't find the answer on the
web or the help): how can I extract the mode (modal score) of a vector?
Assuming that your vector contains only integers:
v - sample(1:5, size=20, replace=T)
v
[1] 1 1 1 1 2 3 5 1 1 5
Dear R-users,
I have a data set where each observation consists of a number of trials
(n.trials) that varies between 5 and 7, 6 being most common. Each trial
can take either of two outcomes, success or failure.
A dummy data set:
n.trials - sample(5:7, 50, replace=T, prob=c(0.2, 0.6, 0.2))
Hi,
try assign the output of glm to a object.
g - glm(model)
names(g)
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40 S 49° 16' 22
Ohttp://maps.google.com/maps?f=qhl=enq=Curitiba,+Brazillayer=ie=UTF8z=18ll=-25.448315,-49.276916spn=0.002054,0.005407t=kom=1
On 4/23/07, elyakhlifi
Google random forests see Leo Brieman's site, Wikipedia, esp link
at bottom of wikipedia page to Andy Matt's article in RNews
I did a DMA/AC webinar in January. Slides are at:
http://www.porzak.com/JimArchive/JimPorzak_RFwithR_DMAAC_Jan07_webinar.pdf
On 4/23/07, Ron Michael [EMAIL PROTECTED]
Without knowing much about your problem, it is hard to suggest good
strategies. However, if you are having trouble with the estimates of
covariance matrix not being positive-definite, you can force them to be
positive-definite after each iteration, before moving on to the next
iteration. Look at
Hi,
I'm trying to figure out if there are any packages allowing
one to fit mixed models (or non-linear mixed models) to data
that includes censoring.
I've done some searching already on CRAN and through the mailing
list archives, but haven't discovered anything. Since I may well
have done a
You can of course print out the values in your objective function, as that
is where you want the information. In any case, using R's debugging
facilities (e.g. dump.frames debugger) would have enabled you to find
the input values are which your function was failing. Please see the
chapter
http://www.stat.uiowa.edu/~luke/R/namespaces/morenames.html
http://www.ci.tuwien.ac.at/Conferences/useR-2004/Keynotes/Tierney.pdf
http://cran.r-project.org/doc/Rnews/Rnews_2003-1.pdf
may all help, but there is as yet nothing (AFAIK) like a comprehensive
user-level manual.
On Mon, 23 Apr 2007,
Douglas:
AFAIK, this is subject area of active current research. Diggle, Heagerty,
Liang, and Zeger , 2002, (ANALYSIS OF LONGITUDINAL DATA) say on p.316: An
emerging consensus is that analysis of data with potentially informative
dropouts necessarily involves assumptions which are difficult, or
Hi Bert,
Yes, I am always wary when one software offers something that
other do not.
The censoring I'm faced with (at present) isn't as complicated
as with much 'survival' data. I'm trying to analyze assay data
and have a lower limit of detection (LLD) to contend with.
Once the level of the
Thanks a lot for all your suggestions; they have been extremely helpful. I will
work through each (starting with Ravi's suggestions) and get back with other
questions if they arise.
Deepankar
- Original Message -
From: Ravi Varadhan [EMAIL PROTECTED]
Date: Monday, April 23, 2007 1:26
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Monday, April 23, 2007 8:45 AM
To: John Kane; Daniel Nordlund; r-help@stat.math.ethz.ch
Subject: Re: [R] importing sas datasets
Hi John and Daniel,
Thanks for your suggestions, I updated line 127 of the
Apologies in advance if I've misunderstood something or this is a
stupid question.
When using the R on my Mac (2.4.1 and 2.3.0), if I exit and ask to save
the workspace, .RData is updated but .Rhistory is not. Introduction to
R makes it sound like both should be saved, and it clearly happened
Howdy,
I was just wondering if anyone out there has compiled R to run on the
IBM BlueGene, and if so, could they share their compilation options /
configuration?
Thanks,
Mike
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Doug,
In perhaps similar situations where there are clusters of measurements
due to repeated time or space on an individual subject or experimental
unit, I have used the survreg() function from the survival library.
You can specify left, right, and/or interval censoring within a data set
through
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