Hi Michael, many thanks for your comment.
Below the original data as imported from Stata format. I deleted some columns with explaining variables because they were unnecessary and working; the model has several explaining variables with generic regression coefficients. pid Choice V7.Ch 1 V7.Ch 2 V7.Ch 3 V7.Ch 4 V7.Ch 5 V7.Ch 6 V4 VS 1 Choice 1 4 4 3 1 3 2 Choice 1 Choice 1 2 Choice 1 3 4 -3 -5 3 -5 Choice 1 Choice 1 3 n.a. n.a. n.a. 5 4 -5 -5 n.a. 0 4 Choice 2 -3 -4 1 2 -3 -2 Choice 2 Choice 2 5 Choice 1 3 3 2 -1 1 1 Choice 1 Choice 1 6 Choice 4 1 -3 -3 3 1 0 Choice 4 Choice 4 7 n.a. -3 -3 0 -2 -5 -5 n.a. 0 8 n.a. n.a. n.a. n.a. n.a. n.a. n.a. Choice 6 0 9 Choice 1 3 2 2 -1 2 3 Choice 3 0 10 n.a. -5 -5 -5 -5 -5 -5 Choice 6 0 11 Choice 2 2 -2 4 2 -5 n.a. Choice 2 Choice 2 12 n.a. 2 2 2 0 3 2 Choice 3 0 13 Choice 1 5 3 -5 -5 3 3 Choice 1 Choice 1 14 n.a. 1 1 -2 -2 3 3 n.a. 0 15 n.a. 1 -1 0 -1 2 3 Choice 3 0 16 Choice 3 3 2 2 1 3 3 n.a. Choice 3 17 Choice 3 2 2 2 2 4 5 n.a. 0 18 Choice 1 5 3 0 0 2 2 Choice 1 Choice 1 19 Choice 2 -3 -4 0 2 -5 -5 Choice 4 Choice 2 20 Choice 4 3 2 2 1 1 0 Choice 4 Choice 5 V7 and the other variables with generic variables work perfect. So does V4 which can be used with both a generic and a alternative specific regression coefficient. I only have problems with VS. There, R tells me that the length of the variable causes problems (“Error in model.frame.default(terms(formula, lhs = lhs, rhs = rhs, data = data), : variable lengths differ (found for 'P_id')). However, comparing lengths and dimensions of V4 and VS, I see no difference! Both original data are transformed into numeric values (as.numeric) (all values become to either zero or one, depending on the alternative) and then put into (previously defined) matrixes of the same dimensions. There were no differences visible when checking the transformed variables with STR or CLASS. What else can I check? As stated above, I tried to isolate the problem-laden variable VS to set up a single conditional logit model, but I did not manage it to make it to the long format (R comment was: Error in data[[choice]] : subscript out of bounds). No idea whether there is a connection between the two problems. Any comment would be much appreciated. Best regards and a nice weekend! -- View this message in context: http://r.789695.n4.nabble.com/length-of-variable-in-mlogit-tp4638323p4639069.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
