Is it possible in R to do a regression on two interacted factors and have no reference?

Vote count:

0

I want no reference factors, that is, I am interacting X and Y, I want

X1*Y1 to be one regression, then X1*Y2 then X2*Y1 etc..

(the tensor product)

not

X1 Y1 X1*Y1 etc...

asked 30 secs ago

robbieboy74

167

Is it possible in R to do a regression on two interacted factors and have no reference?