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trythis
2008 Dec 04
1
comparing SAS and R survival analysis with time-dependent covariates
...fferent. This seems to happen when there are ties in the
events/covariates times.
My question is what software, R or SAS, is more reliable for the
survival analysis with time-dependent covariates or if you could point
out a problem in the following example.
Example. SAS gives HR=3.236:
data trythis;
input id days timedeli stat;
datalines;
1 3 .5 1
2 1.5 1 1
3 6 1000 0
4 8 1000 1
5 8 1 0
6 21 1000 1
7 11 3 1
run;
proc phreg data=trythis;
model days*stat(0)=deli/risklimits ties=exa...
2009 Aug 03
3
session logging
Consider all the text that one sees on the console during an R session.
Is there a way, within R, to make all this text--both the "output" and the "messages"--automatically get copied to a single text file, in addition to seeing it on the console?
If I remember to save the console to a file at the end of my R session, that does it. But
(1) That requires pointing and