Dear Jeremy
The NAs do not seem random to me as the gaps between successive NAs are
either 3, 8 or 11.
Have you considered the possibility that the finite precision of real
numbers in computers may be the issue here?
On 15/03/2015 11:04, Jeremy Clark wrote:
Dear All,
The following gives a very unpleasant experience with apparently random NAs
- probably it's my bad formatting of the coding - but the effect is
unexpected and if undetected can lead to considerable problems:
myvector1 = NULL
myvector3 = NULL
myvector4 = NULL
myvector5 = NULL
myvector1 <- c(1:100)
myvector3[[1]] <- seq(myvector1[1], myvector1["length"(myvector1)], by =
0.01)
myvector4[[1]] <- seq(95, 100, by = 0.01)
myvector5[[1]] <- match(myvector4[[1]], myvector3[[1]])
myvector5
## A solution (but rather annoying):
myvector5[[1]] <- match(as.list(myvector4[[1]]), as.list(myvector3[[1]]))
myvector5
Could anyone tell me why the NAs occur ??
Many thanks.
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