Example 15: Average Area by replicates

• Question: How can I group peaks in the different replicates?

• Answer: You can group peaks by compound name or by RT. Use the MatchingOption value to define the scenario.

• Scope: Peak or group

• Type: Double

• Find a function to return a list of matching peaks (AllMatchingPeaksOrGroups)

• Choose the MatchOption. Since you want a ratio for all peaks, choose MatchOption.ClosestRT or MatchOption.ClosestRTOnSignal. Use the Delta so that the ratio is not computed with a peak too far away.

• Find a function to return the replicates of an injection (Replicates in injection function).

Formula

Average("Peak_Area", AllMatchingPeaksAndGroups(MatchOption.ClosestRT,CurrentInjection.Replicates)) (evaluates all signals)

or

Average("Peak_Area",AllMatchingPeaksAndGroups(MatchOption.ClosestRT,CurrentSignal.MatchingSignalsInReplicates)) (evaluates only the same signal as for the current peak)