Alexander Søndergaard wrote:
Hi all,
I'm new to R. Having a functional background, I was wondering what's
the idiomatic way to iterate. It seems that for loops are the default
given there's no tail-call optimization.
I'm curious to know whether there is a way to transform the following
toy snippet into something that doesn't eat up gigabytes of memory
(like it's for loop counterpart) using laziness:
Reduce('+', seq(1,1e6))
In this case
sum(as.numeric(seq(1, 1e6)))
or according to Gauss
1e6 * (1e6+1) / 2
but for more complicated problems it might be sensible to go the loop
way ...
Uwe Ligges
Thanks!
Best regards,
A.S.
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