asum: Vector 1 norm (sum)

\(\sum_i |Re(x_i)| + |Im(x_i)|\) More...

Functions
template<typename T >
real_type< T >	blas::asum (int64_t n, T const *x, int64_t incx)
float	blas::asum (int64_t n, float const *x, int64_t incx)
	CPU, float version.
double	blas::asum (int64_t n, double const *x, int64_t incx)
	CPU, double version.
float	blas::asum (int64_t n, std::complex< float > const *x, int64_t incx)
	CPU, complex<float> version.
double	blas::asum (int64_t n, std::complex< double > const *x, int64_t incx)
	CPU, complex<double> version.

Detailed Description

\(\sum_i |Re(x_i)| + |Im(x_i)|\)

Function Documentation

asum()

template<typename T >

real_type< T > blas::asum	(	int64_t	n,
		T const *	x,
		int64_t	incx
	)

Returns

1-norm of vector, \(|| Re(x) ||_1 + || Im(x) ||_1 = \sum_{i=0}^{n-1} |Re(x_i)| + |Im(x_i)|\).

Generic implementation for arbitrary data types.

Parameters

[in]	n	Number of elements in x. n >= 0.
[in]	x	The n-element vector x, in an array of length (n-1)*incx + 1.
[in]	incx	Stride between elements of x. incx > 0.