Hello
 
This may have been answered elsewhere, and I have looked on the web, but nothing helps. I am trying to do the following:
 
X<-matrix(c(1:15),nrow=3,byrow=T)
Y<-matrix(c(2,4,6,8,10),ncol=1)
 
I need to sum the product of each row of X by the remaining j rows multiplied by j y values (i.e sum( t(x_i) x_j y_j) ) 
 
Hope this makes sense.
 
Thanks in advance.
 
Ps: how do I reference all the help that I have had from the R: team?

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