But i have to use the ellip filter too in this case, If I use the seperate lib of fftw, I have to find the seperate filter function also. So it is better to use the octave lib. Here is my problem
I have to use those computation in my qt program. But currently I made this through system call
system("octave -qf shellLof.m");
setenv ("GNUTERM", "x11")
V = v(1:l/2);
save fftdata V;
Finally 'fftdata' file loaded in the myprogram.cpp. Can I use the fft function of octave without calling this shell program?