NAME

vcosti - initialize the array WSAVE, which is used in VCOST.

SYNOPSIS

  SUBROUTINE VCOSTI( N, WSAVE)
  INTEGER N
  REAL WSAVE(*)

  SUBROUTINE VCOSTI_64( N, WSAVE)
  INTEGER*8 N
  REAL WSAVE(*)

  SUBROUTINE VCOSTI( N, WSAVE)
  INTEGER :: N
  REAL, DIMENSION(:) :: WSAVE

  SUBROUTINE VCOSTI_64( N, WSAVE)
  INTEGER(8) :: N
  REAL, DIMENSION(:) :: WSAVE

#include <sunperf.h>

void vcosti(int n, float *wsave);

void vcosti_64(long n, float *wsave);

N (input)
Length of the sequence to be transformed. The method is most efficient when N - 1 is a product of small primes. N > = 2.
WSAVE (input/output)
On entry, an array of dimension (2 * N + 15) or greater. VCOSTI is called once to initialize WSAVE before calling VCOST and need not be called again between calls to VCOST if N and WSAVE remain unchanged. Thus, subsequent transforms of same size can be obtained faster than the first since they do not require initialization of the workspace.