Hi
I have dataset with n variables, say n =3 x y z
the formula should be form = x+y+z+x*x +x*y+x*z +y*y + y*z+z*z
my code has to for loop
Is there any way to reduce two loops
for (i in 1:n)
{
for (j in i:n)
{
dat= cbind(dat,dat[,i]*dat[,j])
}
}
-----
Thanks in Advance
Arun
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