Co-clustering is the simultaneous clustering of rows and columns of data. For example, when used for rating questions, or MaxDiff scores, it provides excellent insight into the underlying heterogeneity of this data: which respondents are similar and which items are similar. Adding covariates in the process – both for respondents and for the variables! – adds another layer of insights. This paper will show different ways of visualising co-clustered data and explain the heuristics on how to do co-clustering with covariates.
