Displaying 2 results from an estimated 2 matches for "racedata".
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tracedata
2012 Jun 19
1
weird --no 'dimnames' attribute for array-- error for R lordif package
Hi All,
? I am trying to use the lordif package in R and can't figure out the reason for the above error when I try to run the calctheta() function.
##################
# read data using foreign package - must be Stata 11 or earlier
racedata<- read.dta("race.dta")???
# item responses
resp.data<-racedata[,-c(1:2)]
# grouping variable is in the second column
af<-racedata[,2]
# run lordif
>race.dif<-lordif(resp.data, af, criterion="Chisqr", alpha=0.05, minCell=1)
>attributes(race.dif)
>i...
2011 Aug 25
1
duplicate 'row.names' are not allowed???
Hi
I have an example file in excel and i have following instructions to open and analyze the data in it.
> library(RODBC)
> library(mlogit)
> z<-odbcConnectExcel("C:\\2008 Racedata.xls")
Everything ok untill the next command
> x<-mlogit.data(y,choice="winner",shape="long",id.var="datekey",alt.var="horseno")
Error in `row.names<-.data.frame`(`*tmp*`, value = c("1.8", "1.11", "1.6", :
dupl...