Hi,

For example:

> which(complete.cases(test))
[1] 1 3 4 6

Probably a more elegant way exists.

Regards,
Pascal


2013/5/17 jpm miao <miaojpm@gmail.com>

> Hi,
>
>   I have a sequence whose 1st, 3rd, 4th, 6th are non-NAs. How could I let R
> return 1,3,4,6, the indices?
>
>   I know only how to find the non-NA elements. Thanks,
>
> Miao
>
> > test<-c(2,NA,6,8,NA,12)
> > test[is.na(test)==FALSE]
> [1]  2  6  8 12
>
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>
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