Figure 3.

Unpredictability relationship between endpoint F and G. A) the cutoff of the error rate to select OS (Endpoint F) unpredictable samples is set to 0.9, and the height of the height of bars represent the probability densities of the samples in corresponding EFS (Endpoint G) prediction error, gray bars for all the samples and red for the OS unpredictable samples with error rate larger than 0.9. Obviously, the OS unpredictable samples tend to have high EFS prediction error rate. B) The same situation presents in the EFS unpredictable samples.