2. EL 7
  3. lapack
  4. SCSUM1(3)

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scsum1.f(3) LAPACK scsum1.f(3)

NAME

scsum1.f -

SYNOPSIS

Functions/Subroutines


REAL function scsum1 (N, CX, INCX)
SCSUM1 forms the 1-norm of the complex vector using the true absolute value.

Function/Subroutine Documentation

REAL function scsum1 (integerN, complex, dimension( * )CX, integerINCX)

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

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:

N 



          N is INTEGER


          The number of elements in the vector CX.

CX



          CX is COMPLEX array, dimension (N)


          The vector whose elements will be summed.

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.

Date:

September 2012

Contributors:

Nick Higham for use with CLACON.

Definition at line 82 of file scsum1.f.

Author

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Tue Sep 25 2012 Version 3.4.2