It can take a day, sometimes it can take months. It depends on the size of the data. I try to relate my patterns to what is known about the patient. I may find a pattern that separates out my patients, but I then need to figure out if it means anything, so I look at patient survival. I need to figure out if the pattern that I have discovered groups my patients into groups with different survival patterns (good versus bad). And then I have to figure out the biology behind it all!