[R] How to?

[Peter Dalgaard BSA]

"Yves Gauvreau" <cyg at sympatico.ca> writes:

> Is there a way to apply a function to rows or columns of a matrix?
> 
> Now I use apply(as.matrix(1:nrow(m), 1, function(x) mean(m[x,])) which works
> fine but kind of slow on large matrix. I'm sure there is something on this
> somewhere but I can't find it.

Er, how about

apply(m,1,mean)

??

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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