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1Purpose

f06fbf broadcasts a real scalar into a real vector.

2Specification

Fortran Interface
 Subroutine f06fbf ( n, con, x, incx)
 Integer, Intent (In) :: n, incx Real (Kind=nag_wp), Intent (In) :: con Real (Kind=nag_wp), Intent (Inout) :: x(*)
#include <nag.h>
 void f06fbf_ (const Integer *n, const double *con, double x[], const Integer *incx)
The routine may be called by the names f06fbf or nagf_blas_dload.

3Description

f06fbf performs the operation
 $x←(α,α,…,α)T,$
where $x$ is an $n$-element real vector.

None.

5Arguments

1: $\mathbf{n}$Integer Input
On entry: $n$, the number of elements in $x$.
2: $\mathbf{con}$Real (Kind=nag_wp) Input
On entry: the scalar $\alpha$.
3: $\mathbf{x}\left(*\right)$Real (Kind=nag_wp) array Input/Output
Note: the dimension of the array x must be at least $\mathrm{max}\phantom{\rule{0.125em}{0ex}}\left(1,1+\left({\mathbf{n}}-1\right)×{\mathbf{incx}}\right)$.
On entry: if $|{\mathbf{incx}}|\ne 1$, intermediate elements of x may contain values and will not be referenced; the other elements will be overwritten and need not be set.
On exit: the elements ${x}_{i}$ of the vector $x$ will be stored in ${\mathbf{x}}\left(1+\left(\mathit{i}-1\right)×{\mathbf{incx}}\right)$, for $\mathit{i}=1,2,\dots ,{\mathbf{n}}$.
Intermediate elements of x are unchanged.
4: $\mathbf{incx}$Integer Input
On entry: the increment in the subscripts of x between successive elements of $x$.
Constraint: ${\mathbf{incx}}>0$.

None.

Not applicable.

8Parallelism and Performance

f06fbf is not threaded in any implementation.