cblasdasumN

CBLASSUM is a function from the Basic Linear Algebra Subprograms (BLAS) library, specifically part of the Level 1 BLAS routines. It is designed to compute the sum of the absolute values of the elements in a vector. The function is named "SASUM" in the single-precision real version of BLAS, and "DASUM" in the double-precision real version. The name "CBLASSUM" is a general term used to refer to both versions.

The function takes two main parameters: the number of elements in the vector (N) and a pointer to the first element of the vector (X). It returns a single value, which is the sum of the absolute values of the elements in the vector.

CBLASSUM is commonly used in numerical linear algebra and scientific computing applications. It is particularly useful in algorithms that require the computation of vector norms, such as the L1 norm, which is the sum of the absolute values of the vector elements.

The function is optimized for performance and is typically implemented in low-level languages like C or Fortran. It is part of many high-performance computing libraries and is widely used in both academic research and commercial applications.