cefft - complex FFT
void cefft (x,lx,isign,scale)
input/output array
length of complex array; must be a power of 2
sign of sqrt(-1)
scale factor; sqrt(1./lx) conserves energy
Complex fast Fourier transform along one trace.
C language subroutine for a one-dimensional complex fast Fourier transform. refft performs transforms between elements of a vector The arguments are as follows:
the refft manpage,the rvfft manpage,the cvfft manpage
sepfft