On Mon, 31 Oct 2011, Rich Shepard wrote:
Curious how the database table has a value of 1.00 mg/L and the read data
frame contains NA. More curious is why the cast() data frame has a '2' for
that row.
Further searching in emacs of the text file generated by write.text() I
found two rows for
On Mon, 31 Oct 2011, Justin Haynes wrote:
I'd look at the outputs of those two dcast calls and find cells where the
length is > 1. Those are duplicated entries in your initial data.frames
(when I've run into this is was usually due to NA values somewhere
unexpected).
The dcast() resulting d
On Mon, 31 Oct 2011, Justin Haynes wrote:
However, the dcast calls that "failed" can be helpful for determining the
source of your error. I'd look at the outputs of those two dcast calls
and find cells where the length is > 1. Those are duplicated entries in
your initial data.frames (when I've
The reason dcast would give that warning (not a failure) is if the
formula you gave did not specify unique values. Thus, dcast needs an
aggregating function, which defaults to length.
However, the dcast calls that "failed" can be helpful for determining
the source of your error. I'd look at the
Working with 5 subset streams from my source data frame, three of them
successfully call dcast(), but two fail:
jerritt.cast <- dcast(jerritt.melt, site + sampdate ~ param)
Aggregation function missing: defaulting to length
and
winters.cast <- dcast(winters.melt, site + sampdate ~ param)
Aggr
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