cfft2b cfft2f cfft2i rfft2b rfft2c rfft2f rfft2i

rfft2c() void rfft2c ( int  l, int  m, int  ldr, double  r[], int  ldc, doublecomplex  c[], int *  info  ) Full complex data of two-dimensional Fourier transform by rfft2f Purpose rfft2c reconstructs the full complex data from the packed two-dimensional Fourier transform obtained by rfft2f. Refer to the description of rfft2f for the details of packed form. Parameters [in] l The number of elements to be transformed in the first dimension of the two-dimensional data array. (l >= 1) [in] m The number of elements to be transformed in the second dimension of the two-dimensional data array. (m >= 1) [in] ldr Leading dimension of two dimensional array r[][]. (ldr >= l) [in,out] r[] Array r[lr][ldr] (lr >= m) Two dimensional Fourier forward transform data in packed form obtained by rfft2f. [in] ldc Leading dimension of two dimensional array c[][]. (ldc >= l) [out] c[][] 配列 c[lc][ldc] (lc >= m) The full complex data reconstructed from the packed two-dimensional Fourier transform in r[][]. [out] info = 0: Successful exit = -1: The argument l had an illegal value (l < 1) = -2: The argument m had an illegal value (m < 1) = -3: The argument ldr had an illegal value (ldr < l) = -5: The argument ldc had an illegal value (ldc < l) 出典 FFTPACK 5.1