高斯衰减python实现

def get_score_time_weight(original, offset,scale,current_data):
    diff = current_data-original
    if  math.fabs(diff) < offset:
        return 1
    else:
        var_sqr = scale**2/(2*math.log(2))
        return math.pow(math.e,-(math.fabs(diff)-offset)**2/(2*var_sqr))

效果如下：

 

对应的实际计算公式正态分布概率密度函数去掉常数项为：