I have a set of cancer cell lines for 25 patients and I have their corresponding probe set intensities. I wanted to do some analysis like when I used a drug in all the cell lines it killed some the cancer cell lines but not the other. I wanted to know how I can use the probe sets intensities for the 25 patients to see how they behave differently with the drug. Just some analysis why they are reacting in a particular way to the drug while the others aren't. Suggestions how I should proceed?