pub fn rfft_fftw(input: &ArrayView1<'_, f64>) -> FFTResult<Array1<Complex<f64>>>Expand description
Real-to-complex FFT using FFTW with plan caching
Computes the FFT of a real-valued signal, returning complex frequency components. Uses cached plans for better performance on repeated transforms of the same size.
§Arguments
input- Real-valued input signal
§Returns
- Complex frequency spectrum (N/2+1 components for real input of length N)