Hi,

I'm trying to fit a multinomial logistic regression to my data which
consists of 5 discrete variables (scales 1:10) and 1000 observations.

I get the following error:

Error in `row.names<-.data.frame`(`*tmp*`, value = c("NA.NA", "NA.NA",  :
  duplicate 'row.names' are not allowed
In addition: Warning message:
non-unique value when setting 'row.names': ‘NA.NA’

My code:

> flevel1$Q120<-as.factor(flevel1$Q120)
> MData<-mlogit.data(flevel1, varying=NULL,choice="Q120", shape="wide")
> LogitModel<-mlogit(flevel1$Q120~1|flevel1$Q92, data=MData)

MData[1:10,]
     Q56 Q92 Q102 Q119  Q120
1.1   10   7   10   10 FALSE
1.10  10   7   10   10  TRUE
1.2   10   7   10   10 FALSE
1.3   10   7   10   10 FALSE
1.4   10   7   10   10 FALSE
1.5   10   7   10   10 FALSE
1.6   10   7   10   10 FALSE
1.7   10   7   10   10 FALSE
1.8   10   7   10   10 FALSE
1.9   10   7   10   10 FALSE



Your help will be greatly appreciated.

Maha

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