Visible to Intel only — GUID: GUID-19C8A261-1CB0-4D3D-9FAA-750A460ADD99
Visible to Intel only — GUID: GUID-19C8A261-1CB0-4D3D-9FAA-750A460ADD99
Mean
Computes the mean value of a vector.
Syntax
IppStatus ippsMean_32f(const Ipp32f* pSrc, int len, Ipp32f* pMean, IppHintAlgorithm hint);
IppStatus ippsMean_32fc(const Ipp32fc* pSrc, int len, Ipp32fc* pMean, IppHintAlgorithm hint);
IppStatus ippsMean_64f(const Ipp64f* pSrc, int len, Ipp64f* pMean);
IppStatus ippsMean_64fc(const Ipp64fc* pSrc, int len, Ipp64fc* pMean);
IppStatus ippsMean_16s_Sfs(const Ipp16s* pSrc, int len, Ipp16s* pMean, int scaleFactor);
IppStatus ippsMean_32s_Sfs(const Ipp32s* pSrc,int len,Ipp32s* pMean,int scaleFactor);
IppStatus ippsMean_16sc_Sfs(const Ipp16sc* pSrc, int len, Ipp16sc* pMean, int scaleFactor);
Include Files
ipps.h
Domain Dependencies
Headers: ippcore.h, ippvm.h
Libraries: ippcore.lib, ippvm.lib
Parameters
pSrc |
Pointer to the source vector. |
pMean |
Pointer to the output result. |
len |
Number of elements in the vector |
hint |
Suggests using specific code. The possible values for the hint argument are described in Hint Arguments. |
scaleFactor |
Scale factor, refer to Integer Scaling. |
Description
This function computes the mean (average) of the vector pSrc, and stores the result in pMean. The mean of pSrc is defined by the formula:
The hint argument suggests using specific code, either faster but less accurate calculation, or more accurate but slower calculation.
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error when the pMean or pSrc pointer is NULL. |
ippStsSizeErr |
Indicates an error when len is less than or equal to 0. |
Example
The example below shows how to use the function ippsMean_32f
void mean(void) { Ipp32f *x = ippsMalloc_32f(1000), mean; int i; for(i = 0; i<1000; ++i) x[i] = (float)rand() / RAND_MAX; ippsMean_32f(x, 1000, &mean, ippAlgHintFast); printf_32f("mean =", &mean, 1, ippStsNoErr); ippsFree(x); }
Output:
mean = 0.492591 Matlab* Analog: >> x = rand(1,1000); mean(x)