def compute_num_true_positives(ref_freqs, est_freqs, window=0.5, chroma=False):
    """Compute the number of true positives in an estimate given a reference.
    A frequency is correct if it is within a quartertone of the
    correct frequency.

    Parameters
    ----------
    ref_freqs : list of np.ndarray
        reference frequencies (MIDI)
    est_freqs : list of np.ndarray
        estimated frequencies (MIDI)
    window : float
        Window size, in semitones
    chroma : bool
        If True, computes distances modulo n.
        If True, ``ref_freqs`` and ``est_freqs`` should be wrapped modulo n.

    Returns
    -------
    true_positives : np.ndarray
        Array the same length as ref_freqs containing the number of true
        positives.

    """
    n_frames = len(ref_freqs)
    true_positives = np.zeros((n_frames, ))

    for i, (ref_frame, est_frame) in enumerate(zip(ref_freqs, est_freqs)):
        if chroma:
            # match chroma-wrapped frequency events
            matching = util.match_events(
                ref_frame, est_frame, window,
                distance=util._outer_distance_mod_n)
        else:
            # match frequency events within tolerance window in semitones
            matching = util.match_events(ref_frame, est_frame, window)

        true_positives[i] = len(matching)

    return true_positives
def compute_num_true_positives ( ref_freqs , est_freqs , window = 0.5 , chroma = False ) : n_frames = len ( ref_freqs ) true_positives = np . zeros ( ( n_frames , ) ) for i , ( ref_frame , est_frame ) in enumerate ( zip ( ref_freqs , est_freqs ) ) : if chroma : matching = util . match_events ( ref_frame , est_frame , window , distance = util . _outer_distance_mod_n ) else : matching = util . match_events ( ref_frame , est_frame , window ) true_positives [ i ] = len ( matching ) return true_positives
Compute the number of true positives in an estimate given a reference.
    A frequency is correct if it is within a quartertone of the
    correct frequency.

    Parameters
    ----------
    ref_freqs : list of np.ndarray
        reference frequencies (MIDI)
    est_freqs : list of np.ndarray
        estimated frequencies (MIDI)
    window : float
        Window size, in semitones
    chroma : bool
        If True, computes distances modulo n.
        If True, ``ref_freqs`` and ``est_freqs`` should be wrapped modulo n.

    Returns
    -------
    true_positives : np.ndarray
        Array the same length as ref_freqs containing the number of true
        positives.