Fig. 2From: Rapid classification of group B Streptococcus serotypes based on matrix-assisted laser desorption ionization-time of flight mass spectrometry and machine learning techniquesExample of binning method for feature extraction. At the upper part, we stacked three mass spectra as examples, and their ranges are from m/z 2000 to m/z 2030. At the lower part, all mass spectra were divided by using ten different sizes of error regions from 1 Da to 10 Da. The blue squares indicate that at least one peak from any data is in the range of the binBack to article page