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Covariance and Correlation

协方差与相关系数

Posted by Yao Yao on September 6, 2014

Moment, Expectation, Variance, Skewness and Kurtosis

矩、期望、方差、偏度与峰度

Posted by Yao Yao on September 4, 2014

R Exploratory Data Analysis: Air Pollution Case Study

Posted by Yao Yao on August 28, 2014

R: Saving, Loading and Removing in-memory Data

Posted by Yao Yao on August 12, 2014

R: Getting and Cleaning Data

Posted by Yao Yao on August 2, 2014

What are Confounding Factors and How do they Affect Studies?

Posted by Yao Yao on August 1, 2014

What are the differences among different study designs, and what are the relative advantages of each?

Posted by Yao Yao on July 31, 2014

An Example of Experimental Design

Posted by Yao Yao on July 31, 2014

Types of Data Science Questions

Posted by Yao Yao on July 29, 2014

R console theme

Posted by Yao Yao on July 26, 2014