cfftm1di,zfftm1di(3F)					 cfftm1di,zfftm1di(3F)

NAME    [Toc]    [Back]

     cfftm1di, zfftm1di	- initialize the coefficient array for complex-tocomplex
 Multiple 1D FFT modules.

SYNOPSYS    [Toc]    [Back]

     FORTRAN SPECIFICATION
     subroutine	CFFTM1DI( n, coeff )
     integer		      n
     complex		 coeff(n+15)

     subroutine	ZFFTM1DI( n, coeff )
     integer		      n
     double complex	 coeff(n+15)

     C SPECIFICATION
     #include <fft.h>
     complex *cfftm1di(	int n, complex *coeff);

     zomplex *zfftm1di(	int n, zomplex *coeff);

DESCRIPTION    [Toc]    [Back]

     Initialize	the coefficient	array which is used in the Multiple 1D FFT
     modules.  This array contains the different twiddle factors and the
     factorization of N	into prime numbers.
     As	the FFT	modules	cfftm1d	or zfftm1d only	read the coeff array, it may
     be	reused as long as necessary once it has	been initialized.

     In	C, if ptr is NULL, cfftm1di or zfftm1di	returns	a pointer to an
     allocated buffer.

     CFFTM1DI should be	used to	initialize the coefficient array before	any
     call to CFFTM1D
     ZFFTM1DI should be	used to	initialize the coefficient array before	any
     call to ZFFTM1D

PARAMETERS    [Toc]    [Back]

     N - Integer. Specifies the	length of the sequence to be transformed.
     Unchanged on exit.

     COEFF - Array (C or Fortran) or NULL pointer(C).

Example	of Calling Sequence
     Initializing a coefficient	array for complex-to-complex FFTs of size 200.

     Fortran :
	  complex coeff(200+15)
	  call cfftm1di( 200, coeff)

     C :
	  #include <fft.h>
	  complex *coeff;



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cfftm1di,zfftm1di(3F)					 cfftm1di,zfftm1di(3F)



	 coeff = cfftm1di( 200,	NULL);

SEE ALSO    [Toc]    [Back]

	  fft, cfftm1d,	zfftm1d


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