Contents

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

NAME

     dezfti - initializes the array WSAVE, which is used in  both
     DEZFTF and DEZFTB.

SYNOPSIS

     SUBROUTINE DEZFTI(N, WSAVE)

     INTEGER N
     DOUBLE PRECISION WSAVE(*)

     SUBROUTINE DEZFTI_64(N, WSAVE)

     INTEGER*8 N
     DOUBLE PRECISION WSAVE(*)

  F95 INTERFACE
     SUBROUTINE DEZFTI(N, WSAVE)

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

     SUBROUTINE DEZFTI_64(N, WSAVE)

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

  C INTERFACE
     #include <sunperf.h>

     void dezfti(int n, double *wsave);

     void dezfti_64(long n, double *wsave);

ARGUMENTS

     N (input) Length of the sequence to be transformed.  N >= 0.

     WSAVE (input)
               On entry, an array with a dimension of at least (3
               *  N  +  15).  The same work array can be used for
               both DEZFTF  and  DEZFTB  as  long  as  N  remains
               unchanged.   Different  WSAVE  arrays are required
               for different values of  N.   This  initialization
               does  not  have  to  be  repeated between calls to
               DEZFTF or DEZFTB as long as  N  and  WSAVE  remain
               unchanged,   thus  subsequent  transforms  can  be
               obtained faster than the first.