Application of the Variable Precision Rough Sets Model to Estimate the Outlier Probability of Each Element

Algorithm 4

Pseudo-code of the βμ_PROB algorithm.

βμ_PROB (U, X, R, PDF()): P

    Pseudo-code                               Comments

1     OUTLIERS = FIND_OUTLIER_REGION (U,   Apply probability distribution PDF for each

    X, R)                                    region

2     for each                      For every element of the universe

         P[e] = 0                             Initial probability

3      for each              For each rectangle of exceptionality

4       P[e] = P[e] + PDF(rect)           Accumulate the probability of each rectangle

5     return P                                  Return P