# sum1 - Man Page

sum1: sum | x_i | (in LAPACK)

## Synopsis

### Functions

double precision function dzsum1 (n, cx, incx)
DZSUM1 forms the 1-norm of the complex vector using the true absolute value.
real function scsum1 (n, cx, incx)
SCSUM1 forms the 1-norm of the complex vector using the true absolute value.

## Function Documentation

### double precision function dzsum1 (integer n, complex*16, dimension( * ) cx, integer incx)

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

NAG Ltd.

Contributors:

Nick Higham for use with ZLACON.

Definition at line 80 of file dzsum1.f.

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

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

NAG Ltd.

Contributors:

Nick Higham for use with CLACON.

Definition at line 80 of file scsum1.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Info

Tue Nov 28 2023 12:08:43 Version 3.12.0 LAPACK