sfft1dui,dfft1dui(3F) sfft1dui,dfft1dui(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
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