Developer Reference

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?sum1

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

Syntax

float
scsum1
(
const
MKL_INT
*
n
,
const
MKL_Complex8
*
cx
,
const
MKL_INT
*
incx
)
double
dzsum1
(
const
MKL_INT
*
n
,
const
MKL_Complex16
*
cx
,
const
MKL_INT
*
incx
)
Include Files
  • mkl.h
Description
Given a complex vector
cx
,
scsum1
/
dzsum1
functions take the sum of the absolute values of vector elements and return a single/double precision result, respectively. These functions are based on
scasum
/
dzasum
from Level 1 BLAS, but use the true absolute value and were designed for use with
clacon
/
zlacon
.
Input Parameters
n
Specifies the number of elements in the vector
cx
.
cx
Array, size at least
(1+(
n
-1)*abs
(
incx
))
.
Contains the input vector whose elements will be summed.
incx
Specifies the spacing between successive elements of
cx
(
incx
> 0).
Return Values
Sum of absolute values.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.