[R] Help with the Error Message in R "Error in 1:nchid : result would be too long a vector"

David Winsemius dw|n@em|u@ @end|ng |rom comc@@t@net
Mon Sep 21 22:14:54 CEST 2020

If you had included output of summary(mydata) we might be more capable 
of giving a fact-based answer but I'm guessing that you have a lot of 
catagorical variables with multiple levels and some sort of combinatoric 
explosion is resulting in too many levels of a constructed factor.



On 9/21/20 12:55 PM, Rahul Chakraborty wrote:
> Hello everyone,
> I am using *mlogit* to analyse my choice experiment data. I have *3
> alternatives* for each individual and for each individual I have *9
> questions*. I have a response from *516 individuals*. So it is a panel of
> 9*516 observations. I have arranged the data in long format (it contains
> 100 columns indicating different variables and identifiers).
> In mlogit I tried the following command---
> *mldata<- mlogit.data(mydata, shape = "long", alt.var = "Alt_name", choice
> = "Choice_binary", id.var = "IND")*
> It is giving me the following error message- Error in 1:nchid : result
> would be too long a vector
> Could you please help me with this? I don't think it is too big a data 100
> ROWS*13932 columns. I faced no issue in Excel. I am stuck due to this issue.
> Thanks in advance.
> -- Best Regards,
> Rahul Chakraborty
> Research Fellow
> National Institute of Public Finance and Policy
> New Delhi- 110067
> 	[[alternative HTML version deleted]]
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