qvality web server

This page allows you to use qvality to compute posterior error probability and q-values for your data. There are two input modes:

Input the empirical score distribution and a corresponding null score distribution. The two inputs do not have to contain the same numbers of scores.

Input only the empirical p-value distribution. In this case, you must use p-values rather than raw scores.

In either mode, the output is the same: a three-column file in which the first column contains sorted observed scores, the second column contains estimated q-values, and the third column contains estimated posterior error probabilities.