SUBROUTINE VSINQI(N,WSAVE)
C***BEGIN PROLOGUE VSINQI
C***DATE WRITTEN 860701 (YYMMDD)
C***REVISION DATE 900509 (YYMMDD)
C***CATEGORY NO. J1A3
C***KEYWORDS FAST FOURIER TRANSFORM, SINE TRANSFORM, ODD WAVE
C NUMBERS, MULTIPLE SEQUENCES
C***AUTHOR BOISVERT, R. F. (NIST)
C***PURPOSE Initialize for VSINQF and VSINQB.
C***DESCRIPTION
C
C Subroutine VSINQI initializes the array WSAVE which is used in
C both VSINQF and VSINQB. The prime factorization of N together with
C a tabulation of the trigonometric functions are computed and
C stored in WSAVE.
C
C Input Parameter
C
C N the length of the sequence to be transformed. The method
C is most efficient when N is a product of small primes.
C
C Output Parameter
C
C WSAVE a work array which must be dimensioned at least 3*N+15.
C The same work array can be used for both VSINQF and VSINQB
C as long as N remains unchanged. Different WSAVE arrays
C are required for different values of N. The contents of
C
C WSAVE must not be changed between calls of VSINQF or VSINQB.
C
C***REFERENCES P. N. Swarztrauber, Vectorizing the FFTs, in Parallel
C Computations, (G. Rodrigue, ed.), Academic Press, 1982,
C pp. 51-83.
C***ROUTINES CALLED VCOSQI
C***END PROLOGUE VSINQI
DIMENSION WSAVE(*)
C***FIRST EXECUTABLE STATEMENT VSINQI
CALL VCOSQI (N,WSAVE)
RETURN
END