I'm looking at memory efficiency for some of the survival code. The
following fragment appears in coxph.fit
coxfit <- .C("coxfit2", iter=as.integer(maxiter),
as.integer(n),
as.integer(nvar), stime,
sstat,
x= x[sorted,] ,
...
Does this make a second copy of x to pass to the routine (my
expectation) or will I end up with 3: x and x[sorted,] in the local
frame of reference, and another due to dup=TRUE?
Terry T.
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