And ...
?which
which(abs(x-y) >0) # or if these are subject to FAQ 7.31, then
which( zapsmall( abs(x-y)) > 0 )
.. for second part of question.
-- David.
On Oct 12, 2010, at 1:43 PM, Bert Gunter wrote:
Try preusing an Intro to R for such elementary questions, please. Also
the R Help facility.
But...
?identical ##(oddly enough...)
?"=="
But beware numerical issues -- see R FAQ 7.31.
-- Bert
On Tue, Oct 12, 2010 at 10:35 AM, ANJAN PURKAYASTHA
<anjan.purkayas...@gmail.com> wrote:
Hi,
I have two vectors, each of length 45000.
How do I compare the vectors to ascertain if they are identical.
Secondly if
they are NOT identical, how do I determine the indices of positions
at which
the vectors differ?
Thanks,
Anjan
--
===================================
anjan purkayastha, phd.
research associate
fas center for systems biology,
harvard university
52 oxford street
cambridge ma 02138
phone-703.740.6939
===================================
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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--
Bert Gunter
Genentech Nonclinical Biostatistics
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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David Winsemius, MD
West Hartford, CT
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