costi
costi - initialize the array WSAVE, which is used in COST.
SUBROUTINE COSTI( N, WSAVE)
INTEGER N
REAL WSAVE(*)
SUBROUTINE COSTI_64( N, WSAVE)
INTEGER*8 N
REAL WSAVE(*)
SUBROUTINE COSTI( N, WSAVE)
INTEGER :: N
REAL, DIMENSION(:) :: WSAVE
SUBROUTINE COSTI_64( N, WSAVE)
INTEGER(8) :: N
REAL, DIMENSION(:) :: WSAVE
#include <sunperf.h>
void costi(int n, float *wsave);
void costi_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)
-
On entry, an array of dimension (3 * N + 15) or greater. COSTI is
called once to initialize WSAVE before calling COST and need not be
called again between calls to COST 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.