I want to select top k genes from the gds data and then i want to apply some classification algorithm to find the how much one gene selection algorithms (t-test,chi sq test,mRMR etc) works better from each other.I have used following R code to generate expression set from gds data.
Now i don't know what should i do now. At first have i to normalize it or have to do something else. if i have to normalize it that how can i do it. And after that what should i do.