Use of R intenals in package optBiomarker, ptw and timeSeries

[Prof Brian Ripley]

A recent check in R-devel shows that you are calling .Call()s in package 
"stats", which are not part of the API, specifcally

*** optBiomarker
.C("R_approx", ..., PACKAGE = "stats")

*** ptw
.C("R_approx", ..., PACKAGE = "stats")

*** timeSeries
.C("find_interv_vec", ..., PACKAGE = "base")

The question also arises as to how you knew to make those calls unless 
you copied code from R: and you do not credit such copying.

Can we please have updates which do not use non-API internals, by Aug 20.

See the CRAN daily check pages for your package to see if there are 
other issues which need attention.

Brian Ripley

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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