Thanks so much. It was amazingly clear and helpful. I was just wondering if you have used R to do feature selection by Rough Set Theory? In fact, I would like to use R to do feature selection by Rough Set Theory and I am pretty unsure how to do so. Appreciate it again.
Hi Laurel! Awesome videos, I appreciate what you're doing! Which/how many attributes do I combine to extract rules if the core is empty? Thanks so much.
+Alexander Hohl Hi Alexander! Thank you for the comment! The process does not change if the core is empty. You still add one attribute at a time, check them and move on to adding two attributes or more until you have fully explained the decision feature. The only change is that when you start trying to create rules, you begin with one attribute rather than one attribute plus the core. I hope this helps.
hi mam thnq for ur time giving this session , can i hav any software to do this rough set or matlab code to follow if any u pls suggest me ma'm ,thanking you ma'm
When searching the core.What happen if we need to hide 2 or 3 attributes before we find indiscernibility relation? can we conclude that the core is multiple-attributes??
Regarding your question, sometimes there is not one single indispensable attribute but several. One method to find the core is after trying removing all the attributes in sets of one try removing attributes in sets of two and then three, etc.. This can tell you if the core has multiple attributes. In more complex larger datasets, a multi-attribute core is more common.
