BSL PRO Software Guide - Biopac

Analysis Functions 171MEASUREMENT Area EXPLANATIONMult_infMac onlyNLMMac onlySkewMac onlyMutual Information determines how much could probabilistically be knownabout an unknown signal given a known variable. Specify a time delay.Produces a single valued result.Nonlinear modeling (also called “arbitrary curve fitting”) determines the“best fit” model for the selected data of the selected channel. Themeasurement result corresponds to the value of one of the parameters ofthe best fit. NLM can be used to extract Tau (time delay LVP constant) forassessing cardiac condition. If a Model Expression uses MMT() syntax toreference a measurement and that referenced measurement is linearlyinterpolated, the results of the NLM measurement will also be displayed asbeing linearly interpolated.When combined with the Cycle/Peak Detector, the NLM measurement canbe useful for extracting cycle-by-cycle best fit models for an entirewaveform.Skew indicates the degree of asymmetry in a distribution (away fromnormal Gaussian distribution), e.g. if the distribution is weighted evenly ortrends toward an edge.