BSL PRO 4 Manual - Biopac

Part A — Getting Started 93MeanMedianMedian TMinimum area:2 samplesUses:All points ofselected areaMinimum area:2 samplesUses:All points ofselected areaMinimum area:2 samplesUses:All points ofselected areaMean computes the mean amplitude value of the data samples between theendpoints of the selected area, according to the formula:1Mean = f x in i1Where:n—number of samples;i—index (i = 1.n);xi— values of points at horizontal axis; ( x1– the first point, xn– the last point);f x i- values of points of a curve ( vertical axis).Units: VoltsSample data file: “ValidateMeasurements.ACQ”Result: 1.538462 Volts (for whole wave).Median shows the median value from the selected area.Note: The median and calculation is processor-intensive and can take a longtime, so you should only select this measurement option when you are actuallyready to calculate. Until then, set the measurement to “none.”Units: VoltsMedian T shows the time of the data point that represents the median value of theselected area.Note: The median and calculation is processor-intensive and can take a longtime, so you should only select this measurement option when you are actuallyready to calculate. Until then, set the measurement to “none.”Units: Seconds.nMinMin TMomentMinimum area:1 sampleUses:All points ofselected areaMinimum area:1 sampleUses:All points ofselected areaUses:All points ofselected areaMin (minimum) shows the minimum amplitude value of the data samples betweenthe endpoints of the selected area.Note: For a single point, Min shows the amplitude value in this point.Units: Volts.Min T shows the time of the data point that represent the minimum value of thedata samples between the endpoints of the selected area.Note: For a single point, Min T shows the time value in this point.Units: Seconds.Central Moment is a general-purpose statistical computation that can be used tocompute central variance and other higher-order moments of the data within theselected area. Specify the order as an integer (generally). The central moment iscomputed using the following formula:nmim 1nx xWhere:x—signal;n—points;m—order.None n/a None does not produce a measurement value. It’s useful if you are copying ameasurement to the clipboard or journal with a window size such that severalmeasurements are shown and you don’t want them all copied.iBSL PRO Manual