It's been fun guys :) Take care and good luck for the exam!
One more thing: Learn how to read set notation. Some questions in the exam might be formed using set notation (like in the slides) instead of being given in English, so watch a youtube video on how to read set notation or something. Also, feel free to email me with questions. I know I skipped describing the itemset lattice thing, so if you don't understand it, just email me and I'll tell you how to construct it.
Vote for questions/concepts to be discussed on the last day. You may include questions from the lecture, exercises, or the assessment tests. https://forms.gle/s8AEVEcpkPDpW9iM9
IMPORTANT: For the computation of the Silhouette coefficient in task 9.1, please calculate b as average distance to the points of the nearest cluster (just like in the book) and not as average distance to the points of all other clusters as shown in the slides. This is confirmed to be correct. https://github.com/tchanda90/data-mining/blob/master/notebooks/silhouette_score.ipynb ALSO, please calculate the overall clustering silhouette coefficient as average over all point silhouette values, as shown here in the notebook. In the slides, the overall clustering silhouette coefficient is calculated as average cluster silhouette coefficient which doesn't take different cluster sizes into account.
If you have any doubts regarding the above, feel free to email me tirtha.chanda@ovgu.de