• NAME
• SYNOPSIS
• F95 INTERFACE
• C INTERFACE
• PURPOSE
• ARGUMENTS

NAME

scnrm2 - Return the Euclidian norm of a vector.

SYNOPSIS

  REAL FUNCTION SCNRM2( N, X, INCX)
  COMPLEX X(*)
  INTEGER N, INCX

  REAL FUNCTION SCNRM2_64( N, X, INCX)
  COMPLEX X(*)
  INTEGER*8 N, INCX

F95 INTERFACE

  REAL FUNCTION NRM2( [N], X, [INCX])
  COMPLEX, DIMENSION(:) :: X
  INTEGER :: N, INCX

  REAL FUNCTION NRM2_64( [N], X, [INCX])
  COMPLEX, DIMENSION(:) :: X
  INTEGER(8) :: N, INCX

C INTERFACE

#include <sunperf.h>

float scnrm2(int n, complex *x, int incx);

float scnrm2_64(long n, complex *x, long incx);

PURPOSE

scnrm2 Return the Euclidian norm of a vector x where x is an n-vector.

ARGUMENTS

• N (input)
  On entry, N specifies the number of elements in the vector. N must be at least one for the subroutine to have any visible effect. Unchanged on exit.

• X (input)
  ( 1 + ( n - 1 )*abs( INCX ) ). On entry, the incremented array X must contain the vector x. Unchanged on exit.

• INCX (input)
  On entry, INCX specifies the increment for the elements of X. INCX must be positive. Unchanged on exit.