outer

Thu, May 10, 2001 2:27 AM

Peter Holzer <holzer at stat.math.ethz.ch> writes:

Nope. Since ifelse() evaluates both alternatives, you'll have an
unterminating recursion. The only sure-kill way is to do an explicit
vectorization:

gcd.v <- function(x,y) sapply(seq(along=x),function(i)gcd(x[i],y[i]))
outer(1:5,1:5, gcd.v)

O__  ---- Peter Dalgaard             Blegdamsvej 3  
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outer

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