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Centergram representation

Guillaume Erny edited this page Apr 4, 2017 · 17 revisions

The centergram representation is a superposition of the base peak profile and a line graph representation of the peak list. The line graph is a Matlab stem plot of the peak centre in the x-axis and peak maximum intensity in the y-axis. The example bellow was obtained using the CE-TOFMS urine dataset. The peak list was obtained after the following transformation

  1. myFinnee = myFinnee.filterDataset(1, 'RemoveNoise:5:5:100');
  2. myFinnee = myFinnee.BaselineCorrection(2);
  3. myFinnee = myFinnee.filterDataset(3, 'RemoveNoise:5:5:100');
  4. myFinnee = myFinnee.doCentroid(4, 'LocalMax:2:0');
  5. myPeakList = PeakList(myFinnee.Datasets{5}, 100, 0.1, 5);

The centergram representation is simply obtained using

myPeakList.Centergram

Centergram1

or after zooming in

Centergram1

The superposition of the stem plot with the BPP allows to easily notice coeluting species.


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