[R] case-cohort sampling

[Stefano]

Hi.

I've a dataframe with about 46000 women with about 500 cases (cancers). I
want to define a case-cohort sampling scheme, matching by age and hospital
centre. Is there anyone who has already written a code for that? It should
be something similar to  the stcacoh macro in Stata.

TIA,

Stefano
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._