inverseFft function
Implementation
List<double> inverseFft(List<Complex> data) {
List<double> real = List.filled(data.length, 0);
List<double> imag = List.filled(data.length, 0);
for (int i = 0; i < data.length; i++) {
real[i] = data[i].real;
imag[i] = data[i].imaginary;
}
transform(real, imag);
final len = real.length;
final scale = len.toDouble();
final r = List<double>.filled(len, 0);
r[0] = real[0] / scale;
if (len <= 1) return r;
for (int i = 1; i < len; ++i) {
r[i] = real[len - i] / scale;
}
return r;
}