Algorithm 2.

Bootstrapping(D)

Require: D = {(x1, y1), … (xN, yN)}

1: for i = 1 to N do

2:  for b = 1 to NFOLDS do

3:    Si ← Resample(D)

4:    errorb = 0

5:    totalb = 0

6:    if (xi, yi) ∉ Si then

7:      Mi,b ← BuildModel(Si)

8:      errori,b ← |Mi,b(xi) − yi|

9:      errorb ← errorb + errori,b

10:      totalb ← totalb + 1

11:      errorb ← errorb/totalb

12:    end if

13:  end for

14: end for

15: ${\mathit{\text{accuracy}}}_b\leftarrow 1-\frac{1}{N}{\displaystyle \sum _{i=1}^N}{\mathit{\text{error}}}_b$

16: M ← BuildModel(D)

17: ${\mathit{\text{accuracy}}}_t\leftarrow 1-\frac{1}{N}{\displaystyle \sum _{i=1}^N}|M(x_i)-y_i|$

18: return accuracy ← 0.632 × accuracyb + 0.368 × accuracyt