Impact of MowgliNNI on the proportion of False Positive events. (a) Average false positive error reduction achieved by NNI trees (FP
) w.r.t. that of the initial gene trees (FP
). The positive value indicate that the NNI tree has on average less errors than the initial tree. (b) Average FP of the NNI trees – note that values at threshold 0 correspond to the FP of Mowgli.