Hello,
in "Writing R Extensions" I found the following stuff:
"Note that these coercion functions are not the same as calling as.numeric
(and so on) in R code, as they do not dispatch on the class of the object.
Thus it is normally preferable to do the coercion in the calling R code."
( Writing R Extensions, 2011-04-13, page 100 )
What is meant by this?
Maybe someone can explain me the problem in other words?
What does coercion in R do, and what does coercion in C (not) do?
(And what would be needed in C to get the same effect as in R?)
Thanks,
Oliver
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