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. 2018 Apr 28;18(5):1372. doi: 10.3390/s18051372
Function BackFS(DataMatrix, ClassLabel):
Begin
 Set = null;
 while FeatureNum(DataMatrix) > 1:
   for Feature(i) in DataMatrix:
     Performance(i) = PerformanceMeasurement(DataMatrix\Feature(i))
   remove the jth feature with the largest Performance(j) from DataMatrix
   add the largest Performance(j) into Set
 find the largest one in Set, the subset in that iteration is the best one
End.