TriangleWave
Advanced Analysis Library Only
AnalysisLibErrType TriangleWave (ssize_t numberOfElements, double amplitude, double frequency, double *phase, double triangleWave[]);
Purpose
Generates an array that contains a triangle wave. TriangleWave generates the output array x according to the following formula:
xi = amplitude × tri (phase + f × 360.0 × i)
where frequency = frequency, cycles/sample and where
You can use TriangleWave to simulate a continuous acquisition from a triangle wave function generator. The unit of the input phase is in degrees, and TriangleWave sets phase to (phase + f × 360.0 × n) modulo 360.0 before it returns.
Parameters
| Input | ||
| Name | Type | Description |
| numberOfElements | ssize_t | Number of samples to generate in the triangle wave signal. |
| amplitude | double | Amplitude of the resulting triangle wave signal. Default Value: 1.0. |
| frequency | double | Frequency of the resulting triangle wave signal in normalized units of cycles/sample. Default Value: 7.8125E-3 (1 cycle/128 samples). |
| Output | ||
| Name | Type | Description |
| phase | double | Points to the initial phase, in degrees, of the generated triangle wave signal. Upon completion of TriangleWave, phase points to the phase of the next portion of the signal. Use this parameter in the next call to TriangleWave to simulate a continuous function acquisition. |
| triangleWave | double [] | The generated triangle wave signal. |
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
Examples
Refer to the following examples that use the TriangleWave function:
- analysis\convolve.cws
Open example - analysis\correlat.cws
Open example - analysis\peakest.cws
Open example