Hi, I need a help from your side. I need microarray data for a project. I have two options available for this task. One is to use disease related studies from GEO and then apply R to extract genes associated with the disease of interest that I want to work on. Second option is to use custom CDF files available at http://brainarray.mbni.med.umich.edu/Brainarray/Database/CustomCDF/CDF_download.asp) In first option I will use disease related studies only but in second option there will be CDF files in which there will be a number of unrelated data. Do any one from you help that how I will extract my specific data from the second d tool? Please give a type of workflow.