Peak Counter Filter

Counts the number of peaks in a given spectrum.

Category	Math
Node
Parameters	Peak type: what kinds of peaks to count. (Maximum to count only maxima, Minimum to count only minima, and Any to count both maxima and minima.) ∆y Extrema: the minimum distance in ordinate direction that a minimum and an adjacent maximum must have such that the counter considers them distinct peaks (and not just noise). ∆y Boundary: the minimum distance in ordinate direction that a peak must have from the boundary value such that the counter considers it a peak (and not just noise close to the boundary).
Inputs	Input: the input data
Outputs	Counts: the number of peaks

Effect of the Filter

The filter will count all peaks that match the Peak type parameter in the given input spectrum. The two parameters ∆y Extrema and ∆y Boundary can influence how sensitive the filter is towards smaller peaks (and hence noise).