LAPACK 3.12.0
LAPACK: Linear Algebra PACKage
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◆ scsum1()

real function scsum1 ( integer n,
complex, dimension( * ) cx,
integer incx )

SCSUM1 forms the 1-norm of the complex vector using the true absolute value.

Download SCSUM1 + dependencies [TGZ] [ZIP] [TXT]

Purpose:
!>
!> SCSUM1 takes the sum of the absolute values of a complex
!> vector and returns a single precision result.
!>
!> Based on SCASUM from the Level 1 BLAS.
!> The change is to use the 'genuine' absolute value.
!> 
Parameters
[in]N
!>          N is INTEGER
!>          The number of elements in the vector CX.
!> 
[in]CX
!>          CX is COMPLEX array, dimension (N)
!>          The vector whose elements will be summed.
!> 
[in]INCX
!>          INCX is INTEGER
!>          The spacing between successive values of CX.  INCX > 0.
!> 
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Contributors:
Nick Higham for use with CLACON.