f06ej returns the Euclidean norm of the

n

-element real vector

x

Syntax

C#
public static double f06ej( int n, double[] x, int incx, out int ifail )

Visual Basic
Public Shared Function f06ej ( _ n As Integer, _ x As Double(), _ incx As Integer, _ <OutAttribute> ByRef ifail As Integer _ ) As Double

Visual C++
public: static double f06ej( int n, array<double>^ x, int incx, [OutAttribute] int% ifail )

F#
static member f06ej : n : int * x : float[] * incx : int * ifail : int byref -> float

n: Type: System..::..Int32
On entry: $n$ , the number of elements in $x$ .

x: Type: array<System..::..Double>[]()[][]
An array of size [dim1]
Note: the dimension of the array x must be at least $\max (1, 1 + (n - 1) \times incx)$ .
On entry: the $n$ -element vector $x$ . $x_{i}$ must be stored in $x [1 + (i - 1) \times incx]$ , for $i = 1, 2, \dots, n$ .
Intermediate elements of x are not referenced.

incx: Type: System..::..Int32
On entry: the increment in the subscripts of x between successive elements of $x$ .

Constraint: $incx > 0$ .

ifail: Type: System..::..Int32%
On exit: $ifail = 0$ unless the method detects an error (see [Error Indicators and Warnings]).

f06ej returns the Euclidean norm of the

n

-element real vector

x

Description

f06ej returns the Euclidean norm

{‖x‖}_{2} = \sqrt{x^{T} x}

of the

n

-element real vector

x

scattered with stride incx.

Lawson C L, Hanson R J, Kincaid D R and Krogh F T (1979) Basic linear algebra supbrograms for Fortran usage ACM Trans. Math. Software 5 308–325

Not applicable.

None.

None.