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Table 2 Record of shifts during the peak matching stage in Figure 4.

From: An iterative block-shifting approach to retention time alignment that preserves the shape and area of gas chromatography-mass spectrometry peaks

peak shift (in scan)
  i = 1 i = 2 i = 3 Total
1 (11) - - 11
2 11 ϕ - 11
3 (15) - - 15
4 15 (-2) - 13
5 15 (-2) - 13
6 15 -2 (-1) 12
7 15 -2 (-1) 12