f16 Chapter Contents
f16 Chapter Introduction
NAG C Library Manual

# NAG Library Function Documentnag_dload (f16fbc)

## 2  Specification

 #include #include
 void nag_dload (Integer n, double alpha, double x[], Integer incx, NagError *fail)

## 3  Description

 $x ← α,α,…,αT ,$
where $x$ is an $n$-element real vector and $\alpha$ is a real scalar.

## 4  References

The BLAS Technical Forum Standard (2001) http://www.netlib.org/blas/blast-forum

## 5  Arguments

1:     nIntegerInput
On entry: $n$, the number of elements in $x$.
Constraint: ${\mathbf{n}}\ge 0$.
On entry: the scalar $\alpha$.
3:     x[$\mathit{dim}$]doubleOutput
Note: the dimension, dim, of the array x must be at least $\mathrm{max}\phantom{\rule{0.125em}{0ex}}\left(1,1+\left({\mathbf{n}}-1\right)\left|{\mathbf{incx}}\right|\right)$.
On exit: the scalar $\alpha$ is scattered with a stride of incx in x. Intermediate elements of x are unchanged.
4:     incxIntegerInput
On entry: the increment in the subscripts of x between successive elements of $x$.
Constraint: ${\mathbf{incx}}\ne 0$.
5:     failNagError *Input/Output
The NAG error argument (see Section 3.6 in the Essential Introduction).

## 6  Error Indicators and Warnings

On entry, argument $〈\mathit{\text{value}}〉$ had an illegal value.
NE_INT
On entry, ${\mathbf{incx}}=〈\mathit{\text{value}}〉$.
Constraint: ${\mathbf{incx}}\ne 0$.
On entry, ${\mathbf{n}}=〈\mathit{\text{value}}〉$.
Constraint: ${\mathbf{n}}\ge 0$.

Not applicable.

None.

## 9  Example

This example initializes four elements of a real vector, $x$, with increment $2$, with the value $\alpha =0.3$.

### 9.1  Program Text

Program Text (f16fbce.c)

### 9.2  Program Data

Program Data (f16fbce.d)

### 9.3  Program Results

Program Results (f16fbce.r)