more concordant' numbers in a Cox
regression setting? My guess: My comorbidity score concordant in 4.6% of pairs
in which Charlson's score is not. And Charlson's score is concordant in 4.0% of
pairs in which my comorbidity score is not.
Thank you in advance for your insi
evant Pairs "1.587e+08"
Uncertain "2.861e+07"
C X1 "0.395"
C X2 "0.401"
Dxy X1 "-0.21"
Dxy X2 "-0.198"
Question: How do I interpret the 'x1/x2 more concordant'
Dear John
I am not aware of an R package that does this, but I believe that Patrick
Royston's -stpm- function for Stata does. Here's two references found in
http://www.stata-journal.com/sjpdf.html?articlenum=st0001_2:
Royston, P. 2001. Flexible parametric alternatives to the Cox model. Stata
J
Dear R-listers
I am writing a manuscript for a scientific journal in clinical medicine.
I have three groups of patients, and I present a 10*3 table of their
characteristics in Table 1. Some of their characteristics, e.g. their
age, are on a continuous scale, others are dichotomous. I am thinkin
Dear listers,
With the current version of the 'cmprsk' package it is not possible to
include (non-continuously) time-dependent covariates in a Fine + Gray
competing risks regression model. Is anyone aware of a workaround, or
could an updated cmprsk package be underway? My current workaround is
Dear R-helpers
I have two SpatialPolygonsDataFrame objects, but I want to plot only the
boundary between them. The boundary object is to be overlaid I plot that
I have made, so I would strongly prefer a method that does not rely on
grid graphics.
Thank you in advance for any pointers.
Kind regar
dure would stop automatically when it encounters any anomaly
that causes it to warn me. Is this possible? And if so, how?
Thank you in advance for any assistance.
Peter Jepsen, MD
> sessionInfo()
R version 2.8.1 (2008-12-22)
i386-pc-mingw32
locale:
LC_COLLATE=Danish_Denmark.1252;LC_CTYPE=D
Dear R-listers,
I am using R for Windows Vista 64-bit. I have no experience working with
maps, but now I have to plot a map of Denmark in which each Danish
county is color-coded according to its incidence rate of a particular
disease. My problem is that I don't know where to start. I have read the
Dear R-listers,
I am trying to assign colnames to a data frame within a loop, but I keep
getting a "target of assignment expands to non-language object"-error. I
need to split up a large dataset into about 20 smaller ones, and I would
like to assign colnames within the loop, so I won't have to typ
Thank you, Duncan! It works perfectly!
Best regards,
Peter.
-Original Message-
From: Duncan Murdoch [mailto:murd...@stats.uwo.ca]
Sent: 27. januar 2009 13:04
To: Peter Jepsen
Cc: r-help@r-project.org
Subject: Re: [R] Sweave'ing Danish characters
On 26/01/2009 5:44 PM, Peter J
Hi,
I am writing an Sweave document and am using 'xtable' to make frequency tables
of diagnoses of people undergoing cholecystectomy. Some of these diagnoses
contain Danish characters ("æ", "ø", and "å"), and these characters are all
garbled in the Latex document after I run Sweave. The odd thi
e will do the trick.
I would like to add that using data is a somewhat bad behavior, as this
overwrites the build in data function of R.
And I changed the way you made up the data.frame, as your method would
convert everything to factors.
Good luck
Bart
Peter Jepsen wrote:
>
> Dear R-
12 # This patient was transferred at time 6 and discharged at
time 12. The admission starting at time 17 is therefore irrelevant.
b 0 10
c 0 3
d 0 6
I have tried tons of variations over lapply, sapply, split, for etc.,
all to no avai
Hi,
I'm using Sweave with xtable to generate Latex tables. My problem is that some
of the tables are too wide, and I would like to use the tiny font for these
tables, but not for the others nor for the text. I can't work out how to
accomplish that.
The Latex code below does what I want it to,
perfect tool for this job, but it doesn't seem to be available
for Windows. Is anybody out there aware of a similar Windows tool?
Thank you again for your help.
Peter.
-Original Message-
From: Gabor Grothendieck [mailto:[EMAIL PROTECTED]
Sent: 3. april 2008 17:08
To: Peter Jepsen
Subjec
Dear R-Listers,
I am a Windows user (R 2.6.2) using the development version of sqldf to
try to read a 3GB file originally stored in .sas7bdat-format. I convert
it to comma-delimited ASCII format with StatTransfer before trying to
import just the rows I need into R. The problem is that I get this
e
Hi,
I think it looks like a spineplot.
Best regards,
Peter.
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of mika03
Sent: 28. marts 2008 13:37
To: r-help@r-project.org
Subject: [R] Quick question: Does this graph have a name?
http://www.nabble.com/file/
s.
Best regards,
Peter.
-Oprindelig meddelelse-
Fra: Terry Therneau [mailto:[EMAIL PROTECTED]
Sendt: 31. januar 2008 15:52
Til: Peter Jepsen
Cc: r-help@r-project.org
Emne: Re: Direct adjusted survival?
> The lines that I hoped to be the survival probabilities for each
edtrt-group
>
(cfit, se.fit = F) # Changed from "survfit.coxph"
to "survfit"
fits <- outer(bfit$surv,explp.off,function(x,y) x^y)
avg.fits <-
apply(sweep(fits,2,weights,"*"),c(1,3),sum)/sum(weights)
dimnames(avg.fits) <- list(NULL,
Hello,
I am trying to find an R function to compute 'direct adjusted survival'
with standard errors. A SAS-macro to do this is presented in Zhang X,
Loberiza FR, Klein JP, Zhang MJ. A SAS macro for estimation of direct
adjusted survival curves based on a stratified Cox regression model.
Comput
If anyone is interested in seeing "Nightingale's Coxcomb" a.k.a. "Nightingale's
Rose", it can be seen at
http://www.economist.com/world/europe/displaystory.cfm?story_id=10278643.
Best regards,
Peter.
-Oprindelig meddelelse-
Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] På vegne af R
David,
You should probably have a look at the 'msm' package.
Best,
Peter.
-Oprindelig meddelelse-
Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] På vegne af Doran, Harold
Sendt: 29. oktober 2007 13:46
Til: David Kaplan; [EMAIL PROTECTED]
Emne: Re: [R] Markov models
David
I think tran
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