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The method Integrate calculates the definite integral of a signal represented by an equidistant series of values which are stored in the vector. The parameters BoundLow and BoundHigh specify the boundaries of the integration and may be fractional within a valid range of 1.0 and TVector.NrOfElem. The integration method has to specified by the parameter Method and provides the following approximations:
Please note that all parts of the signal outside the array of reference points (which are, by definition, all vector elements between the boundaries) are linearly interpolated (irrespective of the type of integration).
For mathematical details on Simpson's rule please see the following literature: