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…

Multiple Regression What is multiple regression? Multiple regression is regression analysis with more than one independent variable. It is used to quantify the influence of two or more independent variables on a dependent variable. The general multip…

In two previous blog posts I discussed some techniques for visualizing relationships involving two or three variables and a large number of cases. In this tutorial I will extend that discussion to show some techniques that can be used on large datase…

这篇文章是对之前啊啊救救我,为何我的QQ图那么飘(全基因组关联分析)这篇文章的一个补坑. LD SCore除了查看显著SNP位点对表型是否为基因多效性外,还额外补充了怎么计算表型的遗传度和遗传相关性. 1 下载.安装ldsc git clone https://github.com/bulik/ldsc.git cd ldsc 2 安装ldsc依赖的环境 conda env create --file environment.yml source activate ldsc 3 测试是否安装成功…

成本函数(cost function)也叫损失函数(loss function),用来定义模型与观测值的误差.模型预测的价格与训练集数据的差异称为残差(residuals)或训练误差(test errors). 我们可以通过残差之和最小化实现最佳拟合,也就是说模型预测的值与训练集的数据最接近就是最佳拟合.对模型的拟合度进行评估的函数称为残差平方和(residual sum of squares)成本函数.就是让所有训练数据与模型的残差的平方之和最小. 我们用R方(r-squared)评估预测的效…

Source: http://wenku.baidu.com/link?url=9KrZhWmkIDHrqNHiXCGfkJVQWGFKOzaeiB7SslSdW_JnXCkVHsHsXJyvGbDva4V5A-uuOl84mg5zkTECichHX_AsN0mZalfI9BzDFOeNe-G### ❤ Simple linear regression 1. Y = β0 + β1*X + e where: Y - dependent variable (response) X - indepe…

This is the 2nd part of the series. Read the first part here: Logistic Regression Vs Decision Trees Vs SVM: Part I In this part we’ll discuss how to choose between Logistic Regression , Decision Trees and Support Vector Machines. The most correct ans…

High-Speed Tracking with Kernelized Correlation Filters 的翻译与分析 基于核相关滤波器的高速目标跟踪方法,简称KCF 写在前面,之所以对这篇文章进行精细的阅读,是因为这篇文章极其重要,在目标跟踪领域石破天惊的一篇论文,后来在此论文基础上又相继出现了很多基于KCF的文章,因此文章好比作大厦的基石,深度学习,长短记忆等框架网络也可以在KCF上进行增添模块,并能够达到较好的效果,因此我将深入学习这篇文章,并在此与大家分享,由于学识有限,难免有些谬…

Basic Information Authors: Jooyong Yi, Shin Hwei Tan, Sergey Mechtaev, Marcel Böhme, Abhik Roychoudhury Publication: EMSE'17 Conclusion: In general, with the increase of traditional test suite metrics, the reliability of repairs tend to increase. In…

CORRELATION COEFFICIENTS We've discussed how to summarize a single variable. The next question is how to summarize a pair of variables measured on the same observational unit--(percent of calories from saturated fat, cholesterol level), (amount of fe…