sfftm1dui,dfft1mdui(3F) sfftm1dui,dfft1mdui(3F)NAME
sfftm1dui, dfftm1dui - Multiple 1D, FFT Real to Complex workspace
initialization routines.
FORTRAN SPECIFICATION
subroutine SFFTM1DUI( n, workspace )
integer n
real workspace(*)
subroutine DFFTM1DUI( n, workspace )
integer n
double precision workspace(*)
C SPECIFICATION
float *sfftm1dui( int n, float *workspace)
double *dfftm1dui( int n, double *workspace)
DESCRIPTION
SFFTM1DUI and DFFTM1DUI initialize the array WORKSPACE which is used in
SFFTM1DU and DFFTM1DU. 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 number of elements in the sequence to be
transformed. Unchanged on exit.
WORKSPACE - Array.
A work array which must be dimensioned at least N + 15.
On exit, WORKSPACE will contain the prime factorization of N, together
with a tabulation of the trigonometric functions.
SEE ALSO
o32fft
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