[R] convering upper triangular matrix into vector

[Peter Dalgaard]

e.rapsomaniki at mail.cryst.bbk.ac.uk writes:

> Hi
> 
> I have two symmetrical distance matrices and want to compute the correlation
> coefficient between them (after turning them into vectors). 
> 
> Is there a way of selecting only the upper triangular part of each matrix, then
> convert this into a vector so I can compute the correlation?

X[upper.tri(X)]

(as help.search("triangular") would have told you soon enough)

-- 
   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
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