PolyEv1D
Advanced Analysis Library Only
AnalysisLibErrType PolyEv1D (double inputArray[], ssize_t numberOfElements, double coefficientsArray[], int numberOfCoefficients, double outputArray[]);
Purpose
Performs a polynomial evaluation on the input array. PolyEv1D obtains the ith element of the output array using the following formula:
where i is the array index, k is numCoefficients, p is the coefficient index, and coef is coefArray.
The size of coefArray must be greater than or equal to the order of the polynomial plus 1.
PolyEv1D can perform the operation in place; that is, the input and output arrays can be the same.
The following example uses the PolyEv1D function.
double inputData[10], polyData[10], coefficientArray[5];
double multiplier, additiveConstant;
int numElements, initialValue, finalValue;
AnalysisLibErrType status;
// Generate coefficient array using the Ramp function to
// use in the evaluation of the input data
numElements = 5;
initialValue = 1.0;
finalValue = 5.0;
Ramp(numElements, initialValue, finalValue, coefficientArray);
// Generate an array of random numbers
status = Uniform (10, 17, inputData);
status = PolyEv1D(inputData, 10, coefficientArray, numElements, polyData);
Parameters
| Input | ||
| Name | Type | Description |
| inputArray | double [] | Input array used as the basis for the polynomial evaluation. |
| numberOfElements | ssize_t | Number of elements used in the polynomial evaluation of the input array. |
| coefficientsArray | double [] | The array that contains the coefficients used in the polynomial evaluation of the input array. If there are k coefficients, the order of the polynomial is k – 1. |
| numberOfCoefficients | int | Number of coefficients used in the polynomial evaluation. This parameter does not specify the polynomial order. The polynomial order is numCoefficients – 1. Default Value: 1. |
| Output | ||
| Name | Type | Description |
| outputArray | double [] | Polynomially evaluated array. |
Return Value
| Name | Type | Description |
| status | AnalysisLibErrType | A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants. |
Additional Information
Library: Advanced Analysis Library
Include file: analysis.h
LabWindows/CVI compatibility: LabWindows/CVI 3.1 and later