Displaying 20 results from an estimated 200 matches similar to: "Survr error"
2008 Jun 17
2
R error using Survr function with gcmrec
Would someone be able to help with this question? I'm using the
Gcmrec, Survrec, and Design packages to do a power analysis on
simulated data. I'm receiving an error after using the Survr function
that all data must have a censoring time even after using the gcmrec
function: newdata<-addCenTime(olddata). My program is below. I'd
greatly appreciate any help!
2005 Mar 13
2
PRI Call Reference Length not Supported
Using CVS-HEAD libpri, CVS-HEAD zaptel, CVS-STABLE asterisk.
Everything compiled fine. No problems loading chan_zap.so.
Incomming calls to PRI work fine. Outbound is a different story:
-- Executing Dial("SIP/64.72.107.4-4122fb40", "ZAP/R1d/18005551212|60")
in new stack
-- Called R1d/18005551212
-- Channel 0/23, span 1 got hangup
Mar 13 13:19:29 WARNING[28835]:
2004 May 27
2
Is it possible to read jpeg files into R?
Hi Helpers,
Does anyone know how to read jpeg, bmp or png files into R?
I have some photos of brain scans and I want to quantify
some aspects of their size. I might be able to do this
with the 'locator' function, if I could figure out how
to read the files in and make them into an image that
I can display on the R Windows device. I have experimented
with readBin, using a simple
2004 Mar 19
2
How to collect trees grown by rpart
Jonathan,
Try making a list instead of an array. See ?list. Also, did you look into
random forests? I'm not sure what you want to do, but there might be
methods there to do some of the work for you.
Sean
On 3/19/04 1:12 PM, "Jonathan Williams"
<jonathan.williams at pharmacology.oxford.ac.uk> wrote:
> I would like to collect the trees grown by rpart fits in an array,
2004 Mar 11
3
making operators act on rows of a data frame
Dear R helpers,
I wish to use the "sum" operator for each row of a data frame.
However, it appears that the operator acts on the entire data
frame, over all columns. What is the best way to obtain row-
wise operation?
The following code shows my attempts so far, and their problems:-
test1=array(rbinom(120,1,0.5),c(20,3))
test1[,3]=NA
sum(test1[,1:2])
test1[,3][sum(test1[,1:2])>=2]=1
2003 Jan 20
2
Too many e-mails
Oh dear - I joined the R help mailing list last week,
in order to ask a specific question. I did not realise
that I would start to receive all e-mails to and from
the mailing list. Is there a way of letting me receive
only the answers to my own questions? If not, then can
you remove me from the mailing list?
Thanks,
Jonathan Williams
Jonathan Williams
OPTIMA
Radcliffe Infirmary
Woodstock Road
2003 Dec 30
1
odd results from polr vs wilcoxon test
Dear R helpers,
I would like to ask why polr occasionally generates results that look very
odd.
I have been trying to compare the power of proportional odds logistic
regression with
the Wilcoxon test. I generated random samples, applied both tests and
extracted and
compared the p-values, thus:-
library(MASS)
c1=rep(NA,100); c2=c1
for (run in 1:100)
{
dat=c(rbinom(20,12,0.65),rbinom(20,12,0.35))
2003 May 19
1
plotting a simple graph
I am having great difficulty plotting what should be a simple graph.
I have measured 1 'y' and 5 'x' variables in each of two groups.
Linear regression shows significant differences in the slopes of the
regression for each 'x' variable between the two groups.
All that I want to do is to plot one graph that shows the scatterplot
for the three groups (each group represented
2004 Apr 27
3
R hang-up using lm
Dear R-helpers,
I have found a slightly annoying problem when trying to
plot lines on graphs. I first created my data using
tapply, thus:-
y1=as.vector(fit1$coef$random$id)
x1=tapply(o1,id,median,na.rm=T)
x2=tapply(o2,id,median,na.rm=T)
#then I plot the data, thus:-
plot(x1[x2==0],y[x2==0])
#if I now try to fit the linear regression, R 'hangs up'
2005 May 05
3
can't create Zap channel
Before you jump ahead, yes I do have chan_zap.so loaded..
Call Flow: Asterisk 1 --IAX2--> Asterisk 2 ---> PRI
-- Accepting AUTHENTICATED call from 22.22.22.22:
> requested format = ulaw,
> requested prefs = (),
> actual format = ulaw,
> host prefs = (ulaw|alaw|gsm),
> priority = mine
-- Executing
2003 Feb 13
1
(no subject)
Dear R helpers,
I have a curious problem, which is that a program I have written in R
crashes R, unpredictably. When I say that the program crashes R, I mean
that it causes R to terminate, completely. But, the operating system
(Windows) continues OK.
The program loops around a randomForest regression. I am trying to use
randomForest to predict the diagnosis for a set of patients with dementia.
I
2003 Feb 13
0
(no subject)
Jonathan,
Is there any possibility for you to send me the data, and/or the code? I
and others have seen similar problems before, but not reproducible on the
current version, at least on the NT and Linux boxes that I have access to.
As Thomas said, it's difficult to nail these kinds of problems. Having
reproducible data and code, at least, can help. (It's no help that I'm no
expert
2003 Aug 11
0
Designing and incorporating a digital filter
I have a time series of data from an electroencephalogram (EEG).
I wish to filter the data to get rid of 50Hz mains 'hum'. I have
'designed' a combination bandpass and notch filter using a web-
site. The site returns the filter in "ANSI C" source code. It is:-
/* Digital filter designed by mkfilter/mkshape/gencode A.J. Fisher
Command line:
2004 Mar 15
2
imputation of sub-threshold values
Is there a good way in R to impute values which exist,
but are less than the detection level for an assay?
Thanks,
Jonathan Williams
OPTIMA
Radcliffe Infirmary
Woodstock Road
OXFORD OX2 6HE
Tel +1865 (2)24356
2004 Apr 27
0
Extracting labels for residuals from lme
Dear R-helpers,
I want to try to extract residuals from a multi-level
linear mixed effects model, to correlate with another
variable. I need to know which residuals relate to
which experimental units in the lme. I can show the
labels that relate to the experimental units via the
command
ranef(fit0)$resid
which gives:
604/1/0 -1.276971e-05
604/1/1 -1.078644e-03
606/1/0 -7.391706e-03
606/1/1
2004 Feb 19
3
suppressing non-integer labels for plot x-axis
Dear R-helpers,
I am having difficulty making R plot only integer labels on the x-axis
of a simple graph. I want to plot the median values of a score on each
of three occasions. Non-integer occasions are impossible. But, R keeps
labelling the x-axis with half-occasions, despite my attempts to stop
this using the "xaxs" and "xaxp" parameters of 'plot'.
p1=c(1,2,3);
2005 Mar 15
1
PRI: Call Reference Length not supported
I'm not a PRI expert and therefore don't know what this debug stuff means
for PRI, so if anyone can help me here...
I'm running the latest libpri and zaptel from CVS.
Keep in mind that everything works fine when using the STABLE libpri and
zaptel.
I am NOT running CVS asterisk. I am running 1.0.6.
asterisk*CLI> pri intense debug span 1
Enabled EXTENSIVE debugging on span 1
T203
2005 Sep 02
6
Looking for better "Follow Me"
Hi everybody :)
I am a new member here and hope that someone gives me a hint for my problem:
Let's say I am at work and my SIP phone (KPhone in my case) is connected to my
private Asterisk. I want to call my wife at home so her SIP phone rings. She
does not pick up the phone (maybe she is somewhere in the house and has to
run to the phone) so after 15 seconds her cell phone should ring.
2007 Jan 02
6
package dependency tree
Is there a painless way to find the names of all packages on CRAN
that "Depend" on a specified package?
url: www.econ.uiuc.edu/~roger Roger Koenker
email rkoenker at uiuc.edu Department of Economics
vox: 217-333-4558 University of Illinois
fax: 217-244-6678 Champaign, IL 61820
2001 Apr 24
1
New Package Released: PTAk
PTAk_1.1-1 ( Principal Tensor Analysis on k modes) has been released on
CRAN
A multiway method to decompose a tensor (array) of any
order,
as a generalisation of SVD also supporting non-identity
metrics and penalisations.
2-way SVD with these extensions is also available. The
package includes also some other multiway
methods: PCAn (Tucker-n) and