Feature Selection for Very Short-Term Heavy Rainfall Prediction Using Evolutionary Computation

// 𝐴: set of heavy-rain cases in training set

// 𝐵: set of no-heavy-rain cases in training set

// 𝑅: set of no-heavy-rain cases sampled from B, that is, 𝑅⊆𝐵

// 𝑇: undersampled training set

𝑙 ← the number of heavy-rain cases, that is, ∣A∣;

initialize 𝑅 to be empty;

while (l > 0)

 randomly choose one value from B;

 if the value is not in 𝑅, then

  add the value to 𝑅;

  𝑙 ← 𝑙  − 1;

 end if

end while

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