[R] removing for loop

vincent at 7d4.com vincent at 7d4.com
Tue Jul 4 11:43:19 CEST 2006

Dear Rusers,

Trying to reduce my for loops addiction,
could somebody tell me if there are ways to simplify
(and perhaps accelerate ?) the following line

for (i in 1:N) for (j in 1:N) m[i,j] = b[i]-b[j];

(where m is a NxN matrix and b a vector of length N)

Thanks for any hint.

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