Filter

Filtering is used to remove spots that are found to be inadequate by performing the Wilcoxon signed rank-based gene expression presence/absence detection algorithm. This function performs the hypothesis test: where $ R_i = (PM_i - MM_i) / (PM_i + MMi_)$ for each $ i$ in a probe-pair in the probe-set represented by data.

Small $ p$-values imply presence while large ones imply absence of transcript. The detection call is computed by thresholding the $ p$-value as in:

In SciCraft you have the option of filtering based on the following three criterions



Bjørn Kåre Alsberg 2006-04-06