I'm afraid I need your help with linear models in R, I apologize in advance is this question was beaten to death. I'm trying to fit Y( i, j ), where i is row, j is column. My model is log [ Y( i, j ) ] = log A( i ) * B( j )+ C( i ) ] + error. I have i x j observations, I need to find 2*i + j parameters. What would be the best way to approach this? Thank you! - H.