Arctan

Computes the inverse tangent of each element of a vector.

Syntax

IppStatus ippsArctan_32f(const Ipp32f* pSrc, Ipp32f* pDst, int len);

IppStatus ippsArctan_64f(const Ipp64f* pSrc, Ipp64f* pDst, int len);

IppStatus ippsArctan_32f_I(Ipp32f* pSrcDst, int len);

IppStatus ippsArctan_64f_I(Ipp64f* pSrcDst, int len);

Parameters

pSrc	Pointer to the source vector.
pDst	Pointer to the destination vector.
pSrcDst	Pointer to the source and destination vector pSrcDst for the in-place operation.
len	Number of elements in the vector.

Description

The function ippsAtan is declared in the ipps.h file. This function computes the inverse tangent of each element of pSrc and stores the result in the corresponding element of pDst.

The computation is performed as follows:

pDst [n] = arctan(pSrc [n]), 0 ≤ n < len.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when the pSrc, pDst, or pSrcDst pointer is NULL.
ippStsSizeErr	Indicates an error when len is less than or equal to 0.