On Oct 29, 2010, at 5:14 AM, dpender wrote:
That's helpful but the reason I'm using clusters in evd is that I
need to
specify a time condition to ensure independence.
I believe this is the first we heard about any particular function or
package.
I therefore have an output
We would need to know the code that produced that output and either
the data to which that code was applied or the structure of the
output. (Use the str() function)
in the form Cluster[[i]][j-k] where i is the
cluster number and j-k is the range of values above the threshold
taking
account of the time condition.
Unless you find someone who uses that package in the manner you have,
you will need to explain in much greater detail than you have so far.
From this I can get durations easily enough but the spacing is
proving quite
difficult.
There are quite possibly methods using rle() or possibly something
like rollapply() from the zoo package, but you need to provide a
specific and richer test case.
The data is for ocean waves and therefore it may be possible that
the wave
height drops below the threshold for a short period but should still
be
considered part of the same event, hence the time conditon.
Hope this clarifies the problem.
It clarifies it to the extent that it show how much more you will need
to further clarify.
--
David Winsemius, MD
West Hartford, CT
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