On Thu, 20 Nov 2008, A Ezhil wrote:
Dear All,
I have a matrix of size 10000 x 50. I would like to calculate all
possible pair-wise correlation coefficient (5x10^7 combinations) using
cor(). How can I efficiently calcualte and save the result in a matrix?
By using cor()??
res <- cor( t( mat ) )
only takes about 10 seconds on my laptop.
To save() the result takes much longer as does load()ing the result back
into fresh session. Save 'mat' instead and do the calculation on the fly
as needed.
HTH,
Chuck
p.s. please read the Posting Guide and do not repost the same msg.
Thanks in advance.
Kind regards,
Ezhil
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Charles C. Berry (858) 534-2098
Dept of Family/Preventive Medicine
E mailto:[EMAIL PROTECTED] UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901
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