# ImpulseResponse

Advanced Analysis Library Only

AnalysisLibErrType ImpulseResponse (double stimulus[], double response[], int numberOfElements, double impulse[]);

## Purpose

Calculates the impulse response of a network based on time-domain signals stimulus and response. The impulse response is in the time domain. The impulse response is the inverse Fourier transform of the transfer function:

where | Sxy(f) is the two-sided cross power spectrum of the stimulus(x) with the response(y)
| Sxx(f) is the two-sided auto power spectrum of the stimulus

## Parameters

Input
Name | Type | Description
stimulus | double-precision array | The time-domain signal, usually the network stimulus.
response | double-precision array | The time-domain signal, usually the network response.
numberOfElements | integer | Number of elements in the input array. Default Value: 1024.
Output
Name | Type | Description
impulse | double-precision array | The impulse response of the network based on time-domain signals stimulus and response. The size of this array must be at least numberOfElements.

## 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.