step.py 文件源码

def calc_approx_func(time, altitude, div = 5, der = 0 ,deg = 100, lim = 1):
    dict = {}

    for i in range(div):
        f = trendline.approx_func(
            time[max(int((i - lim) * len(time) / div), 0):min(len(time), int((i + lim) * len(time) / div))],
            altitude[max(int((i - lim) * len(time) / div), 0):min(len(time), int((i + lim) * len(time) / div))], deg)

        for j in range(der):
            f = np.polyder(f)

        dict[min(time[-1], time[int((i + 1) * len(time) / div) - 1])] = f

    return dict