sdfft1dui(3F)

NAME
     sfft1dui, dfft1dui - 1D FFT Real to Complex workspace initialization
     routines.

FORTRAN SPECIFICATION
     subroutine SFFT1DUI( n, workspace )
     integer              n
     real                 workspace(*)

     subroutine DFFT1DUI( n, workspace )
     integer              n
     double precision     workspace(*)


C SPECIFICATION
     double  *dfft1dui( int n, double *workspace);

     float   *sfft1dui( int n, float *workspace);


DESCRIPTION
     SFFT1DUI and DFFT1DUI initialize the array WORKSPACE which is used in
     SFFT1DU and DFFT1DU. The prime factorization of N, together with a
     tabulation of the trigonometric functions are computed and stored in
     WORKSPACE.

     NOTE: These routines are provided only for compatibility with previous
     releases of complib.

PARAMETERS
     N - INTEGER.
     On entry, N specifies the length of the sequence to be transformed.
     Unchanged on exit.

     WORKSPACE - Array.
     A work array which must be dimensioned at least N + 15.  It requires N
     elements for the sines and cosines, plus 15 elements for the
     factorization of N.


SEE ALSO
     o32fft