检测我的数字异常增长/下降的算法

Question

我有一个数据集，其中包含过去 30 天内访问过我网站页面的访问者编号，它看起来像这样:

Page 1: [1,2,66,2,2,7,8]
Page 2: [3,5,8,3,7,11,45]

页面总量巨大。我想应用一种算法来检测在此期间突然增长、激增或下降的页面。有没有一种算法可以让我做到这一点？

Answer 1

int Q = 20;     //Q should be the difference 
                //between two pages that should be 
                //considered a spike

for (int i = 0; i < pages.length; i++){
    page p = pages[i];
    for (int j = 0; j < p.visitors.length - 1; j++){
        if(p.visitors[j] >= p.visitors[j+1] + Q){
            print("Page " + i + " has spike in day " + j);
        }
        else if(p.visitors[j] + Q <= p.visitors[j+1] + Q){
            print("Page " + i + " has spike in day " + (j+1));
        }
    }
}