I'm sure I'm missing something really obvious in the for loop...
Here is simplified data for 3 patients, we need filling in Na's with same WT
for each patient, AUC halved for visit 3, doubled for visit 5 for the same
patient, based on visit 4
for(i in unique(u3s$ID)){
in the area of using R to solve challenging issues.
Best Regards
Ahmed
-Original Message-
From: Mike Marchywka [mailto:marchy...@hotmail.com]
Sent: Thursday, May 26, 2011 8:55 PM
To: gunter.ber...@gene.com; El-Tahtawy, Ahmed
Cc: r-help@r-project.org
Subject: RE: [R] predictive accuracy
I am trying to develop a prognostic model using logistic regression. I
built a full , approximate models with the use of penalization - design
package. Also, I tried Chi-square criteria, step-down techniques. Used
BS for model validation.
The main purpose is to develop a predictive model
...@me.com]
Sent: Thursday, May 26, 2011 10:54 AM
To: El-Tahtawy, Ahmed
Cc: r-help@r-project.org
Subject: Re: [R] predictive accuracy
On May 26, 2011, at 7:42 AM, El-Tahtawy, Ahmed wrote:
I am trying to develop a prognostic model using logistic regression.
I
built a full , approximate models
Hello,
I have been informed that there is no R package for the stratified
Wilcoxon's rank sum test (Van Elteren's test) with the locally best
weights.
I need to use the alternative test to a clinical endpoint where the
distribution approximate normal distribution, and compare to the regular
Dear friends,
Ecdf used to work nicely before.
e.g.
ecdf(df1v[,c(1:6)],group=df1v$trt,q=.5,col=1:2,label.curves=list(keys=l
ines), datadensity=rug)
but now it does not work at all, even for a simpler code??? By the way,
I used the same libraries.
Thanks for your help.
Ahmed
Dear friends,
I need to fill in (duplicate the whole record) the missing days with the
same record values as long as AE is the same value (i.e. 1), once AE
value changes, the process of duplication should proceed with the new AE
value till it changes again. e.g. I need to fill in records: day
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