Signal Processing: First Derivative
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 First_Derivative |
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/Signal_Types= |
The type of signal to be processed |
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/Signal_Names= |
The names of the signals to be processed |
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/Signal_Folder= |
The name of the signal folder |
Compute the first derivative at each point of a signal. The first and last data points become DATA_NOT_FOUND (identified in the C3D file as a POINT Reliability value of &endash;1).
Derivatives are calculated using Finite Difference Algorithms.
Given the signal:
- x(ti) for i=1, 2, ..., n
- The first derivative is calculated using:
- xDot(ti)= (x(ti+1)-x(ti-1))/( (ti+1)-(ti-1) )