NAG Library Function Document

nag_zload (f16hbc)

 Contents

    1  Purpose
    7  Accuracy

1
Purpose

nag_zload (f16hbc) broadcasts a scalar into a complex vector.

2
Specification

#include <nag.h>
#include <nagf16.h>
void  nag_zload (Integer n, Complex alpha, Complex x[], Integer incx, NagError *fail)

3
Description

nag_zload (f16hbc) performs the operation
x α,α,,αT ,  
where x is an n-element complex vector and α is a complex scalar.

4
References

Basic Linear Algebra Subprograms Technical (BLAST) Forum (2001) Basic Linear Algebra Subprograms Technical (BLAST) Forum Standard University of Tennessee, Knoxville, Tennessee http://www.netlib.org/blas/blast-forum/blas-report.pdf

5
Arguments

1:     n IntegerInput
On entry: n, the number of elements in x.
Constraint: n0.
2:     alpha ComplexInput
On entry: the scalar α.
3:     x[dim] ComplexOutput
Note: the dimension, dim, of the array x must be at least max1,1+n-1incx.
On exit: the scalar α scattered with a stride of incx. Intermediate elements of x are unchanged.
4:     incx IntegerInput
On entry: the increment in the subscripts of x between successive elements of x.
Constraint: incx0.
5:     fail NagError *Input/Output
The NAG error argument (see Section 3.7 in How to Use the NAG Library and its Documentation).

6
Error Indicators and Warnings

NE_ALLOC_FAIL
Dynamic memory allocation failed.
See Section 2.3.1.2 in How to Use the NAG Library and its Documentation for further information.
NE_BAD_PARAM
On entry, argument value had an illegal value.
NE_INT
On entry, incx=value.
Constraint: incx0.
On entry, n=value.
Constraint: n0.
NE_NO_LICENCE
Your licence key may have expired or may not have been installed correctly.
See Section 2.7.5 in How to Use the NAG Library and its Documentation for further information.

7
Accuracy

The BLAS standard requires accurate implementations which avoid unnecessary over/underflow (see Section 2.7 of Basic Linear Algebra Subprograms Technical (BLAST) Forum (2001)).

8
Parallelism and Performance

nag_zload (f16hbc) is not threaded in any implementation.

9
Further Comments

None.

10
Example

The scalar 0.5-0.3i  is loaded into a vector of length 4, stored in x with increment 2 (incx=2).

10.1
Program Text

Program Text (f16hbce.c)

10.2
Program Data

Program Data (f16hbce.d)

10.3
Program Results

Program Results (f16hbce.r)

© The Numerical Algorithms Group Ltd, Oxford, UK. 2017