def normalize_windows(win_data):
    """ Normalize a window
    Input: Window Data
    Output: Normalized Window

    Note: Run from load_data()

    Note: Normalization data using n_i = (p_i / p_0) - 1,
    denormalization using p_i = p_0(n_i + 1)
    """
    norm_data = []
    for w in win_data:
        norm_win = [((float(p) / float(w[0])) - 1) for p in w]
        norm_data.append(norm_win)
    return norm_data