This list is a plain text list. Posting in HTML frequently leads to corrupted
code on the receiving end. Be sure to read the Posting Guide.
In no programming language is it a good idea to assume equality with floating
point values. See FAQ 7.31. In cases like this use integers to create sequences
and then generate floating point from them. Do not go fishing in floating point
data for specific values.
Also, you seem to be using list objects for no apparent reason.
myvector1 <- c(1L:100L)
myvector3 <- seq(10L*myvector1[1], 10L*myvector1[ length(myvector1) ])
myvector4 <- seq(950L, 1000L)
myvector5 <- match(myvector4, myvector3)
I think the as.list is working because match is internally converting to
character and comparing that... which makes the as.list solution rather
inefficient art best.
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On March 15, 2015 4:04:29 AM PDT, Jeremy Clark <jeremyclark...@gmail.com> 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.
>
> [[alternative HTML version deleted]]
>
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>PLEASE do read the posting guide
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>and provide commented, minimal, self-contained, reproducible code.
______________________________________________
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