Hello, I would like to conduct an exploratory factor analysis with dichotomous data. Do any R routines exist for this purpose? I recall reading something about methods with tetrachoric correlations. Any help would be appreciated. Best, Tom Denson Department of Psychology University of Southern California
You can use factanal to do the analysis. The polychor() package will give you polychorics. You can then the do the factor analysis on this correlation matrix. -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Tom Denson Sent: Friday, December 17, 2004 12:31 PM To: R-help at stat.math.ethz.ch Subject: [R] Factor analysis with dichotomous variables Hello, I would like to conduct an exploratory factor analysis with dichotomous data. Do any R routines exist for this purpose? I recall reading something about methods with tetrachoric correlations. Any help would be appreciated. Best, Tom Denson Department of Psychology University of Southern California ______________________________________________ R-help at stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
On Fri, 17 Dec 2004 13:07:08 -0500, Doran, Harold <HDoran at air.org> wrote:> You can use factanal to do the analysis. The polychor() package will > give you polychorics. You can then the do the factor analysis on this > correlation matrix. > > -----Original Message----- > From: r-help-bounces at stat.math.ethz.ch > [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Tom Denson > Sent: Friday, December 17, 2004 12:31 PM > To: R-help at stat.math.ethz.ch > Subject: [R] Factor analysis with dichotomous variables > > Hello, > > I would like to conduct an exploratory factor analysis with dichotomous > data. Do any R routines exist for this purpose? I recall reading > something about methods with tetrachoric correlations. > > Any help would be appreciated.You may also want to consider the routines in MCMCpack (MCMCordfactanal and MCMCmixfactanal), depending on your application. Chris -- Chris Lawrence - http://blog.lordsutch.com/