I have recently used the heatmap widget in Orange 3. All the documentation says is "Clustering (clusters data by similarity)". Is this using hierarchical or k-means or some other type of clustering?
On that note, is there a way to look at the code being run by all the widgets to see whats going on under the hood? It would be nice if after you finish the workflow you would get a file with the script run to perform the analysis.