Fig. 2.

Position-specific base-calling error rates for the various methods (PRB = Most probable base (MPB), INT = Highest intensity base, RMAP = MBP+quality, GER = MPB+chastity, GNU = Probability, GNUQ = Probability+quality). Notice that GNU seems to have the best error rate for the beginning of the read in both cases. In (b) GNUMAP's performance worsens but the overall error rate is still smaller. Plus this means that GNUMAP will rely more on the beginning of the read while mapping. (a) Indicates that the RMAPQ filtering may not be highly effective against base-calling errors.