On May 14, 2011, at 9:16 AM, Ian Gow wrote:
If I assume that the third column in data.frame.2 is named "val"
then in
SQL terms it _seems_ you want
SELECT a.time, b.val FROM data.frame.1 AS a LEFT JOIN data.frame.2
AS b ON
a.time BETWEEN b.start AND b.end;
Not sure how to do that elegantly using R subsetting/merge,
Huh? It's just two merge()'s (... once you fix the error in the
example.)
--
David
but you might
try a package that allows you to use SQL, such as sqldf.
On 5/14/11 8:03 AM, "David Winsemius" <dwinsem...@comcast.net> wrote:
On May 14, 2011, at 8:12 AM, René Mayer wrote:
Hello,
how can one merge
And what happened when you typed:
?merge
two data frames when in the second data frame one column defines the
start values
and another defines the end value of the to be merged range.
data.frame.1
time ...
13
24
35
46
55
...
data.frame.2
start end
24 37 ?h? ?
...
should result in this
13 NA
24 ?h?
35 ?h?
46 NA
55
?
And _why_ would that be?
thanks,
René
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West Hartford, CT
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