Applying statistical tests to microarray data. Introduction to filtering. Recall- Filtering is the process of deciding which genes in a microarray experiment have significantly varying expression across conditions (and removing from gene expression matrix those that don’t).
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as interesting and keep it (where xCy5 is the background-subtracted intensity of the red dye on the spot corresponding to gene x, xCy3 the same for green and c is a threshold, typically c=1)