mlogit duplicate 'row.names' are not allowed

问题

New to R and want to use mlogit function.

However after putting my data into a data frame and run

x <- mlogit.data(mlogit, choice="PlacedN", shape="long", alt.var="RaceID")

I get duplicate 'row.names' are not allowed

I can upload my file if needed I've spent days trying to get this to work, so any help will be appreciated

回答1:

You may want to put "RaceID" into the alt.levels argument instead of alt.var. From the mlogit.data help file:

alt.levels

the name of the alternatives: if null, for a wide data.frame, they are guessed from the variable names and the choice variable (both should be the same), for a long data.frame, they are guessed from the alt.var argument.

Give this a try.

library(mlogit)
m <- read.csv("mlogit.csv")
mlogd <- mlogit.data(m, choice="PlacedN", shape="long", alt.levels="RaceID")
head(mlogd)
#            RaceID PlacedN   RSP TrA JoA aDS bDS mDS aDH bDH mDH LDH  MR eMR
# 1.RaceID 20119552    TRUE  3.00  13  12   0   0   0   0   0   0   0   0 131
# 2.RaceID 20119552   FALSE  4.00  23  26  91  94  94 139 153 145 153 150 150
# 3.RaceID 20119552   FALSE  0.83  15  15  99 127  99 150 153 150 153 159 159
# 4.RaceID 20119552   FALSE 18.00  21  15   0   0   0   0   0   0   0   0 131
# 5.RaceID 20119552   FALSE 16.00  16  12  92 127  92 134 135 134 135 136 136
# 6.RaceID 20119617    TRUE  2.50  12  10   0   0   0   0   0   0   0   0 152

来源：https://stackoverflow.com/questions/26440404/mlogit-duplicate-row-names-are-not-allowed