Extract vector elements until cumsum <= x
Mark Leeds pointed out to me that the last line should have been: Reduce(f, x, accumulate = TRUE) On Mon, Jan 4, 2010 at 8:43 AM, Gabor Grothendieck
<ggrothendieck at gmail.com> wrote:
Try this which uses 10 as the check value: f <- function(acc, x) if (acc + x > 10) x else acc + x x <- c(4, 6, 2, 7, 4, 1, 4, 8) Reduce(f, x) On Sun, Jan 3, 2010 at 10:02 PM, Dgnn <sharkbrainpdx at gmail.com> wrote:
Hi All,
I have a vector n, and for each n[i] I want to extract n[i], n[i+1],
n[i+2]..., until the cumulative sum of n[i] and subsequent elements exceeds
a CheckValue, whereupon I move to the next index and repeat.
I am trying to find a Vectorized approach, and have seen similar posts where
filter{stat} and rollmean{zoo} were suggested, but, I haven't been able to
figure a way to use them for this problem.
Best wishes to all, and thanks for the help!
Dgnn
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