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dfft3i (3)
  • >> dfft3i (3) ( Solaris man: Библиотечные вызовы )
  • 
    NAME
         dfft3i - initialize the array xWSAVE, which is used in  both
         xFFT3F and xFFT3B.
    
    SYNOPSIS
         SUBROUTINE RFFT3I(M, N, K, RWSAVE)
    
         SUBROUTINE DFFT3I(M, N, K, DWSAVE)
    
         SUBROUTINE CFFT3I(M, N, K, RWSAVE)
    
         SUBROUTINE ZFFT3I(M, N, K, DWSAVE)
    
    
    
         #include <sunperf.h>
    
         void rfft3i(int m, int n, int k, float *wsave) ;
    
         void dfft3i(int m, int n, int k, double *wsave) ;
    
         void cfft3i(int m, int n, int k, complex *wsave) ;
    
         void zfft3i(int m, int n, int k, doublecomplex *wsave) ;
    
    ARGUMENTS
         M         Number of rows to be transformed.  M >= 0.
    
         N         Number of columns to be transformed.  N >= 0.
    
         K         Number of planes to be transformed.  K >= 0.
    
         xWSAVE    On entry, an array with dimension of at least (M +
                   N + MAX(M,N,K) + 45) for real inputs and (2 * (M +
                   N + MAX(M,N,K)) + 45)  for  complex  inputs.   The
                   same  work  array  can  be used for both xFFTF and
                   xFFTB as long as N remains  unchanged.   Different
                   xWSAVE arrays are required for different values of
                   N.   This  initialization  does  not  have  to  be
                   repeated  between  calls to xFFTF or xFFTB as long
                   as N and xWSAVE remain unchanged, thus  subsequent
                   transforms can be obtained faster than the first.
    
    
    
    


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