# Analyzing Sankey diagrams statistically?

Sankey diagrams are helpful for visualizing multiple, interacting processes:

Are there any statistical tools available that can analyze the interactions of multiple processes? I'm aware of sequence analysis tools like TraMineR, but to my knowledge they cannot analyze interactions between multiple processes.

• You don't really have "interactions" except in the colloquial sense of the term. You just have a conditional multinomial at each stage. You can assess that with %'s & CI's. Nov 4, 2015 at 3:18
• @gung: Could you explain "conditional multinomial" in this context? Nov 4, 2015 at 3:19
• Sure: order priority is a multinomial with proportions for critical, high, & not specified, given that you are, say, regular air. Nov 4, 2015 at 3:32
• What do you mean by "analyze"? You seem to be more interesting in visualizing your data. Nov 4, 2015 at 4:38
• @AndrewCharneski: I'm not interested in visualizing, I'm interested in statistical analysis, as the question states. For example, I would love to understand how to get descriptive statistics, use patterns earlier on in the sankey diagram to predict patterns later on, and to use the overall descriptive statistics to predict outcome variables at the end of the process(es) Nov 4, 2015 at 15:35

TraMineR supports multi-channel sequence analysis through e.g. the function seqdistmc() (docs).