weird --no 'dimnames' attribute for array-- error for R lordif package

[Debs Majumdar]

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)
>ipar1 <- race.dif$ipar
> class(ipar1)
[1] "data.frame"
> class(resp.data)
[1] "data.frame"

> head(ipar1)
          a      cb1
I1 2.565834 1.959045
I2 2.033049 1.389847
I3 2.693962 1.951471
I4 1.772003 1.864188
I5 3.478853 2.091705
I6 1.479415 2.586945

> head(resp.data)
  satis dropact empty bored spirits afraid
1   Yes      No    No    No     Yes     No
2   Yes      No    No    No     Yes     No
3    No     Yes   Yes   Yes      No     No
4   Yes      No    No    No     Yes     No
5   Yes      No    No    No     Yes     No
6   Yes      No    No    No     Yes     No 

theta_race <- calctheta(ipar1, resp.data, seq(-4,4,.1),
prior.mean=0,prior.sd=1)
Error in t(pp[, i, resp]) : no 'dimnames' attribute for array


What am I doing wrong here?

Thanks,

Debs


##################


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[David Carlson]

You probably need to contact the lordif package maintainer:

Maintainer Seung W. Choi <[hidden email]>

----------------------------------------------
David L Carlson
Associate Professor of Anthropology
Texas A&M University
College Station, TX 77843-4352

> -----Original Message-----
> From: [hidden email] [mailto:r-help-bounces@r-
> project.org] On Behalf Of Debs Majumdar
> Sent: Tuesday, June 19, 2012 6:17 PM
> To: [hidden email]
> Subject: [R] 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)
> >ipar1 <- race.dif$ipar
> > class(ipar1)
> [1] "data.frame"
> > class(resp.data)
> [1] "data.frame"
>
> > head(ipar1)
>           a      cb1
> I1 2.565834 1.959045
> I2 2.033049 1.389847
> I3 2.693962 1.951471
> I4 1.772003 1.864188
> I5 3.478853 2.091705
> I6 1.479415 2.586945
>
> > head(resp.data)
>   satis dropact empty bored spirits afraid
> 1   Yes      No    No    No     Yes     No
> 2   Yes      No    No    No     Yes     No
> 3    No     Yes   Yes   Yes      No     No
> 4   Yes      No    No    No     Yes     No
> 5   Yes      No    No    No     Yes     No
> 6   Yes      No    No    No     Yes     No
>
> theta_race <- calctheta(ipar1, resp.data, seq(-4,4,.1),
> prior.mean=0,prior.sd=1)
> Error in t(pp[, i, resp]) : no 'dimnames' attribute for array
>
>
> What am I doing wrong here?
>
> Thanks,
>
> Debs
>
>
> ##################
>
>
> ______________________________________________
> [hidden email] mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.

______________________________________________
[hidden email] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.