Hello Rui, Thanks a lot for your response. But, I will surely say that the data I attached is in long format as it has 18 rows (3 alternatives*3 questions* 2 individuals). Had it been a wide format data it would have had 6 rows (3 questions* 2 individuals). But, anyway thanks.
Best, Rahul On Wed, Sep 23, 2020 at 3:23 AM Rui Barradas <ruipbarra...@sapo.pt> wrote: > > Hello, > > Please keep this on the list so that others can give their contribution. > > If you have reshaped your data can you post the code you ran to reshape > it? Right now we only have the original attachment, in wide format, not > the long format data. > > Rui Barradas > > Às 21:55 de 22/09/20, Rahul Chakraborty escreveu: > > Hi, > > > > Thank you so much for your reply. > > Yes, thank you for pointing that out, I apologise for that error in > > the variable name. However, my data is in long format. > > > > See, my first column is IND which identifies my individuals, > > second column is QES which identifies the question number each > > individual faces, 3rd column is a stratification code that can be > > ignored. Columns 6-13 are alternative specific variables and rest are > > individual specific. So 1st 3 rows indicate 1st question faced by 1st > > individual containing 3 alternatives, and so on. So, I have already > > arranged the data in long format. > > > > With that in mind if I use shape="long" it still gives me error. > > > > Best regards, > > > > On Tue, Sep 22, 2020 at 11:00 PM Rui Barradas <ruipbarra...@sapo.pt> wrote: > >> > >> Hello, > >> > >> I apologize if the rest of quotes prior to David's email are missing, > >> for some reason today my mail client is not including them. > >> > >> As for the question, there are two other problems: > >> > >> 1) Alt_name is misspelled, it should be ALT_name; > >> > >> 2) the data is in wide, not long, format. > >> > >> A 3rd, problem is that in ?dfidx it says > >> > >> alt.var > >> the name of the variable that contains the alternative index (for a long > >> data.frame only) or the name under which the alternative index will be > >> stored (the default name is alt) > >> > >> > >> So if shape = "wide", alt.var is not needed. > >> But I am not a user of package mlogit, I'm just guessing. > >> > >> The following seems to fix it (it doesn't throw errors). > >> > >> > >> mldata1 <- dfidx(mydata, shape = "wide", > >> #alt.var = "ALT_name", > >> choice = "Choice_binary", > >> id.var = "IND") > >> > >> > >> Hope this helps, > >> > >> Rui Barradas > >> > >> > >> Às 16:15 de 22/09/20, David Winsemius escreveu: > >>> You were told two things about your code: > >>> > >>> > >>> 1) mlogit.data is deprecated by the package authors, so use dfidx. > >>> > >>> 2) dfidx does not allow duplicate ids in the first two columns. > >>> > >>> > >>> Which one of those are you asserting is not accurate? > >>> > >>> > > > > > > -- Rahul Chakraborty Research Fellow National Institute of Public Finance and Policy New Delhi- 110067 ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
