

Dear colleagues, 


I would like to run a cluster analysis on a number of variables. They are Likert Scale (0 to 10), but they also have a "Don't know' option at the end of the scale. Apparently, with the 'Don't Know' option in place, they cannot be considered to be linear or ordinal. How can these variables be analysed using R? One option would be to use poLC and treat them as categorical variables to classify the respondents into clusters (latent categorical variable). But is there a way to treat them as partly ordinal/conitinuous and partly categorical?

Thank you
Jason

 
Dr. Iasonas Lamprianou
Department of Social and Political Sciences
University of Cyprus

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