On 08/23/2011 09:07 PM, Iasonas Lamprianou wrote:
Thank you for the hint. But this means that I will still have missing responses in my data and this defeats my purpose to analyse the data using cluster analysis.
If it is really necessary to avoid missing values, and there is an indifference point on the scale, and you can defend the decision to consider the "Don't know" option as indifference, you can recode all your "Don't know" responses to indifference.
Jim ______________________________________________ [email protected] 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.

