Jeff - Thanks so very much for the solution and tips, all very much
appreciated! Regards, Stevan
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Note that the solution you asked for is not robust in the presence of missing
data, though Frede's suggestion or something like it would be.
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Jeff NewmillerThe . . Go Live...
DCN:
Note that ddply is a heavyweight solution, and as your data gets larger
you may find that using it for little things like this hits performance.
Also, "df" is a base function that you might actually want to use someday,
and you also introduce confusion in the mind of someone reading your code
if
Hi Frede - Thank you for responding. Not quite what I am after. Notice that I
included two data sets in my post, the first is the raw data whereas the
second (the desired df) is similar but has a column of sequential numbers in
another column at the end - that column of sequential numbers for each
> Sent: 16. april 2014 21:01
> To: r-help@r-project.org
> Subject: [R] help incorporating data subset lengths in function with ddply
>
> Dear R Community,
>
> I am having some trouble with a task that I hope you might be able to help
> with. I have a dataset that include
Dear R Community,
I am having some trouble with a task that I hope you might be able to help
with. I have a dataset that includes the time and corresponding stream
discharge from numerous storms (example of structure with simplified data
below). I would like to produce a field that details the dur
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