Advanced Analysis Library Only
AnalysisLibErrType IIRFiltering (double xArray[], int numberXElements, double aCoefficientArray[], double yConditionsArray[], int numberACoefficients, double bCoefficientArray[], double xConditionsArray[], int numberBCoefficients, double yArray[]);
Filters the input sequence using the IIR filter specified by reverse coefficients aCoefficientArray and forward coefficients bCoefficientArray using the following formula:
The reverse and forward coefficients are obtained by respective IIR coefficient functions, such as Bw_Coef.
Input | ||
Name | Type | Description |
xArray | double-precision array | Array containing the raw data to filter. |
numberXElements | integer | Number of points in both bCoefficientArray and xConditionsArray. |
aCoefficientArray | double-precision array | Array that contains the reverse coefficients for the IIR filtering operation. |
numberACoefficients | integer | Number of coefficients in both aCoefficientArray and yConditionsArray. |
bCoefficientArray | double-precision array | Array that contains the forward coefficients for the IIR filtering operation. |
numberBCoefficients | integer | Number of coefficients in both bCoefficientArray and xConditionsArray. |
Output | ||
Name | Type | Description |
yConditionsArray | double-precision array | Array that contains the initial conditions, or states. The size of this array must be at least numberACoefficients 1. |
yConditionsArray | double-precision array | The final conditions for the next iterations. |
xConditionsArray | double-precision array | Array that contains the initial conditions, or states. The size of this array must be at least bCoefficientArray 1. |
xConditionsArray | double-precision array | The final conditions for the next iterations. |
yArray | double-precision array | The output of the IIR filtering operation. The size of this array must be at least numberXElements. |
Name | Type | Description |
status | AnalysisLibErrType | A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants. |