Machine Learning: Dimensionality Reduction

September 6, 2014 4 分钟阅读

1. Motivation

Covariance and Correlation

September 6, 2014 1 分钟阅读

0. Symbols

Moment, Expectation, Variance, Skewness and Kurtosis

September 4, 2014 3 分钟阅读

0. Dictionary

R Exploratory Data Analysis: Air Pollution Case Study

August 28, 2014 5 分钟阅读

对 Air Pollution Case Study 的总结。

R: Saving, Loading and Removing in-memory Data

August 12, 2014 少于 1 分钟阅读

Saving R Data

R: Getting and Cleaning Data

August 2, 2014 35 分钟阅读

What are Confounding Factors and How do they Affect Studies?

August 1, 2014 2 分钟阅读

confound 的意思是：

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

July 31, 2014 11 分钟阅读

摘自 What are the differences among different study designs, and what are the relative advantages of each?。做目录并排版。 1. Two Classic Types of Studies The two ...

An Example of Experimental Design

July 31, 2014 少于 1 分钟阅读

Question: Does changing the text on your website improve donations?

Types of Data Science Questions

July 29, 2014 2 分钟阅读

摘自 Six Types Of Analyses Every Data Scientist Should Know 和 Types of Questions；两者内容基本相同。