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...r Error in attr(tt, "depFactors")$depFactorVar : $ operator is invalid for atomic vectors Which i dont know what it means. The data is a subset of my real data but should reflect what im trying to do. Thanks JR -- View this message in context: http://n4.nabble.com/trouble-getting-multinimial-logit-model-to-work-properly-tp1588079p1588079.html Sent from the R help mailing list archive at Nabble.com.

Hello, I have a small problem with developing design matrix X, which I use in estimation the log-likelihood of a multinomial logit model. I have the data: number of observation - 289 number of choice alternative- 3 number of choice specific variables in matrix X -4 matrix X =289x4 I tried to use the function createX, I know that I have to get design matrix 289x12 (am I right?) but