Displaying 8 results from an estimated 8 matches for "eortc".
2002 Jan 22
4
splitting a data.frame
...1
for which there may be another approach so as not to mess about creating
a new dataframe
Any ideas?
Gary
__________________________________________________
Gary S. Collins, PhD,
Statistics Research Fellow,
Quality of Life Unit,
European Organisation for Research and Treatment of Cancer,
EORTC Data Center,
Avenue E. Mounier 83, bte. 11,
B-1200 Brussels, Belgium.
Tel: +32 2 774 1 606
Fax: +32 2 779 4 568
http://www.eortc.be/home/qol/
__________________________________________________
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r-help mailing list -...
2001 Oct 18
1
Fw: eval and as.symbol question
----- Original Message -----
From: "Kaspar Pflugshaupt" <pflugshaupt at geobot.umnw.ethz.ch>
To: "Gary Collins" <gco at eortc.be>
Cc: "r-help" <r-help at stat.math.ethz.ch>
Sent: Thursday, October 18, 2001 2:19 PM
Subject: Re: [R] eval and as.symbol question
> On 18.10.2001 13:46 Uhr, Gary Collins wrote:
>
> > But when I merge these into a dataframe with colnames(df)<-
> > c("...
2001 Apr 04
0
factors and characters when attaching data...
...t for when forced to a factor,
Site==" Lung"
when what I ideally want...
Site=="Lung"
__________________________________________________
Gary S. Collins, PhD
Statistics Research Fellow,
Quality of Life Unit,
European Organisation for Research and Treatment of Cancer,
EORTC Data Center,
Avenue E. Mounier 83, bte. 11,
B-1200 Brussels, Belgium.
Tel: +32 2 774 1 606
Fax: +32 2 779 4 568
Email: gco at eortc.be
http://www.eortc.be/home/qol/
__________________________________________________
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2001 May 04
0
R and Xemacs
...extensively before (as I usually use winedt or vi)
I'm not sure where to proceed from here.
Any tips?
Thanks
__________________________________________________
Gary S. Collins, PhD,
Statistics Research Fellow,
Quality of Life Unit,
European Organisation for Research and Treatment of Cancer,
EORTC Data Center,
Avenue E. Mounier 83, bte. 11,
B-1200 Brussels, Belgium.
Tel: +32 2 774 1 606
Fax: +32 2 779 4 568
Email: gco at eortc.be
http://www.eortc.be/home/qol/
__________________________________________________
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-...
2001 Oct 31
2
removing duplicated rows from a data.frame
...files and found nothing useful or quick, only duplicated() and unique() which work only work on lists.
Thanks
Gary.
__________________________________________________
Dr. Gary S. Collins,
Statistics Research Fellow,
Quality of Life Unit,
European Organisation for Research and Treatment of Cancer,
EORTC Data Center,
Avenue E. Mounier 83, bte. 11,
B-1200 Brussels, Belgium.
Tel: +32 2 774 1 606
Fax: +32 2 779 4 568
http://www.eortc.be/home/qol/
__________________________________________________
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2001 Oct 15
0
date and chron library help...!
...e format of the columns with dates was ok using the as.chron function. Am I doing something stupid?
Thanks
Gary.
__________________________________________________
Dr. Gary S. Collins,
Statistics Research Fellow,
Quality of Life Unit,
European Organisation for Research and Treatment of Cancer,
EORTC Data Center,
Avenue E. Mounier 83, bte. 11,
B-1200 Brussels, Belgium.
Tel: +32 2 774 1 606
Fax: +32 2 779 4 568
http://www.eortc.be/home/qol/
__________________________________________________
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2002 Jan 08
6
Subsets without NA
Is there a way of removing all rows with missing values from a data frame?
I usually use
subset(x, var1!="NA")
and repeat for each variable. It would be nice to be able to do it in one
fell swoop. Also, surprisingly, it doesn't always work. Sometimes I'm left
with an empty set even though not all rows have missing values for the
variable.
Cheers,
mikkel
Mikkel Grum,
2006 Jul 18
0
Surv analysis with multiple internal time-dep covariates measured over different time intervals
...osis time until death/cens) with time-dependent
covariates. I would like to fit a cox model using the (start, stop] variable.
In summary, I have the multiple internal time dependent covariates as follows;
1). LAS score (measured weekly on low risk patients, monthly on high risk)
2). EORTC score (measured monthly on low risk patients and every 3 months on
high risk)
3). BMI (measured monthly on low risk patients and every 3 months on high risk)
I have referred to the John Fox 'Cox Proportional-Hazards Regression for Survival
Data'
http://cran.r-project.org/doc/contrib...