[R] finding "chuncks" of data that have no NA s

Gabor Grothendieck ggrothendieck at gmail.com
Fri Jul 18 13:50:19 CEST 2008

na.contiguous.zoo() will return the longest stretch of non-NA data.
Its a zoo method of the na.contiguous generic in the core of R.

rle(!is.na(rowSums(coredata(z)))) will find all stretches.

On Fri, Jul 18, 2008 at 6:47 AM, stephen sefick <ssefick at gmail.com> wrote:
> I have a data frame that is 122 columns and 70000ish rows it is a zoo
> object, but could be easily converted or read in as something else.  It is
> multiparameter multistation water quality data - there are a lot of NA s.  I
> would like to find "chuncks" of data that are free of NA s to do some
> analysis.  All of the data is numeric.  Is there a way besides graphing to
> find these NA less "chuncks".  I did not include data because of the size of
> the data frame, and because I don't know exactly how to tackle this
> problem.  I will send a subset of the data to the list if requested and when
> I get to work.  As for reproducible code I am not entirly sure how to go
> about this, so that too is missing.
> Sorry for breaking the rules this early in the morning,
> Stephen
> --
> Let's not spend our time and resources thinking about things that are so
> little or so large that all they really do for us is puff us up and make us
> feel like gods. We are mammals, and have not exhausted the annoying little
> problems of being mammals.
> -K. Mullis
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