Table of Contents
Interpolate
The Interpolate command fills in any gaps in a signal's data using a spline interpolation. This can be useful if there are unreliable data points (residuals < 0).
The interpolation procedure performs a least-squares fit of an nth order polynomial to k data points.
|(x1,t1),...,(xk,tk)|k >= polynomial order + 1|
The command is given in text form as:
Interpolate /SIGNAL_TYPES= ! /SIGNAL_NAMES= ! /SIGNAL_FOLDER=ORIGINAL ! /RESULT_SUFFIX= ! /RESULT_FOLDER=PROCESSED /MAXIMUM_GAP= ! /NUM_FIT=3 ! /POLYNOMIAL_ORDER=3 ;
Parameters
| Parameter | Description |
|---|---|
| /Signal_Types | The type of signal to be processed. |
| /Signal_Names | The names of the signals to be processed. |
| /Signal_Folder | The name of the signal folder. |
| /Num_Fit | The number of frames of data before and after the “gap” that are used to calculate the coefficients of the polynomial. |
| /Polynomial_Order | The order of the polynomial used. |
| /Maximum_Gap | The maximum number of frames of data that can be replaced with interpolated values. |
Example: Using an expression
Define the maximum size of the gap based on the POINT frame rate.
