
This has been an interesting discussion, and brings up two questions
for me:

Is there a good collection of hints/suggestions for R language idoms in terms
of efficiency? For instance I read not to use for-loops, so I used apply only to
later read that "apply" is internally implemented as a "for" so nothing gained
here. Warnings about pitfalls (such as nested loops), hints, suggestions would
be great.

The second question - is there some sort of profiling tool available that would
make it easy to recognize where the script is spending most of its time? Might
be especially useful for newbies like me.

Thanks all,

Esmail

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