search for: jepsen

...ransferred 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 avail. Thank you in advance for any assistance. Best regards, Peter Jepsen, MD.

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 error: > f <- file("hugedata.csv") > DF <- sqldf("select * from f where

...take it that I have stretched my data too thin, and I discard the final model. Therefore, I would save valuable time if the procedure 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=Danish_Denmark.1252;LC_MONETARY= Danish_Denmark.1252;LC_NUMERIC=C;LC_TIME=Danish_Denmark.1252 attached base packages: [1] stats graphics grDevices utils datasets m...

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 thinking of presenting the age distribution in each group as miniature graphs, each of which must fit in one

...ordant' numbers in a Cox regression setting? My guess: My comorbidity score concordant in 4.6% of pairs but Charlson's score is not. And Charlson's score is concordant in 4.0% of pairs but my comorbidity score is not. Thank you in advance for your insight and help. Best regards, Peter Jepsen Aarhus, Denmark [[alternative HTML version deleted]]

...umbers 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 insight and help. Best regards, Peter Jepsen Aarhus, Denmark

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, but I have to insert the "\tiny{" and the closing "}" by hand. It

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 Methods Programs Biomed 2007;88:95-101. It appears that this method is not implemented in R.

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 help files to packages like 'mapplot', and their examples indicate that I am on 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 type the same thing 20 times over. I have concocted this really goofy example which

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 ("?", "?", and "?"), and these characters are all garbled in the Latex document after I run Sweave. The odd thing is, everything looks absolutely right in the R console, and if

http://www.nabble.com/file/p16349649/at-length.png Hi, I produced this graph with R and I am very happy with it. But now I wonder: Is this some standard way of displaying data and if so, does it have a name? (like Histogram, Box plot etc.) I need to explain the plot to people so knowing a bit more about what exactly this is, would certainly help ;-) Thanks a lot! -- View this message in

I am going to improve theora codec with dynamically changing way. In this case we want to change compression parameters like video_q, sharpness when a keyframe is generated. When i set video quality parameter using cpi-> pb.info.quality in CommpressKeyFrame in encoder_toplevel it will not change dynamically. Can you please help me to do this. Wich function should i cange to achieve my