On Thu, 3 Jun 2004, Rajarshi Guha wrote: > Hi, > I have a matrix, m, over whose rows I want to apply a function. I also > have a vector, r, whose length is equal to the rows of m. > > The obvious way is: > > result <- apply( m, c(1), fun ) > > However the function call requires the row from m and the corresponding > element of r. > > So, I want to pass m[i,] and r[i] to the function. > > Currently I use a loop. But can this be modified to use apply (or > related functions)?
One way is to stick the vector onto the matrix apply(cbind(r,m), 1, function(x) fun(mi=x[-1],ri=x[1])) Incidentally, there's never any point in writing c(1) > identical(c(1),1) [1] TRUE -thomas ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html