Have a look at ?sweep
Br. Frede
Sendt fra Samsung mobil
-------- Oprindelig meddelelse --------
Fra: carol white
Dato:14/05/2014 16.53 (GMT+01:00)
Til: r-h...@stat.math.ethz.ch
Emne: [R] matrix column division by vector
Hi,
What is the elegant script to divide the columns of a matrix by the respective
position of a vector elements?
m=rbind(c(6,4,2),c(3,2,1))
v= c(3,2,1)
res= 6/3 4/2 2/1
3/3 2/2 1/1
this is correct
mat2 = NULL
for (i in 1: ncol(m))
mat2 = cbind(mat2, m[,i]/ v[i])
but how to do more compact and elegant with for ex do.call?
Many thanks
Carol
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