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.
--
David.
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
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