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dzsum1.f(3) LAPACK dzsum1.f(3)

NAME

dzsum1.f -

SYNOPSIS

Functions/Subroutines


double precision function dzsum1 (N, CX, INCX)
 
DZSUM1 forms the 1-norm of the complex vector using the true absolute value.

Function/Subroutine Documentation

double precision function dzsum1 (integerN, complex*16, dimension( * )CX, integerINCX)

DZSUM1 forms the 1-norm of the complex vector using the true absolute value.
Purpose: 
 DZSUM1 takes the sum of the absolute values of a complex
 vector and returns a double precision result.


 Based on DZASUM 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*16 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 ZLACON.
Definition at line 82 of file dzsum1.f.

Author

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Wed Oct 15 2014 Version 3.4.2