[R] Results of applying na.omit on zoo object

[Achim Zeileis]

On Mon, 19 Sep 2011, Rich Shepard wrote:

> On Mon, 19 Sep 2011, Marc Schwartz wrote:
>
>> You can look at ?complete.cases for one approach, presuming that it will
>> work on zoo objects.
>
> Marc,
>
>  That's the opposite of what I want. It returns only rows with no missing
> data. I'm looking for something that will return rows with _only_ missing
> data, and drop them in the bit bucket.

This should do what you want, I think:

R> z <- zoo(matrix(1:8, ncol = 2), Sys.Date() + 0:3)
R> z[2,2] <- NA
R> z[3,] <- NA
R> z

2011-09-19  1  5
2011-09-20  2 NA
2011-09-21 NA NA
2011-09-22  4  8

R> z[!apply(is.na(z), 1, all),]

2011-09-19 1  5
2011-09-20 2 NA
2011-09-22 4  8

hth,
Z

> Thanks,
>
> Rich
>
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