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. |