f06jj computes the Euclidean norm of a complex vector.

Syntax

C#
public static double f06jj( int n, Complex[] x, int incx, out int ifail )

Visual Basic
Public Shared Function f06jj ( _ n As Integer, _ x As Complex(), _ incx As Integer, _ <OutAttribute> ByRef ifail As Integer _ ) As Double

Visual C++
public: static double f06jj( int n, array<Complex>^ x, int incx, [OutAttribute] int% ifail )

F#
static member f06jj : n : int * x : Complex[] * incx : int * ifail : int byref -> float

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

x: Type: array<NagLibrary..::..Complex>[]()[][]
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]).

f06jj computes the Euclidean norm of a complex vector.

Description

f06jj returns the Euclidean norm

{‖x‖}_{2} = \sqrt{x^{H} x}

of the

n

-element complex 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.