These days I read the “Advanced R” Book written by Hadley Wickham. I choose this book since I think I have mastered most of R’s intermediate commands, ...

After logistic regression, it is time to move on the Neural Network Algorithm since we also need to use gradient descent here. So I will first introdu ...

Logistic is one of the most useful regression algorithm, and in this post, I will talk about the algorithm, its optimization method, its implementatio ...

PLA (Perceptron Learning Algorithm) is a very basic machine learning algorithm. It serves as an approach to separate two class of staffs. In this post ...

Now here we will discuss a more fantastic package: ggmap. ggmap is a map implementation of ggplot. With this tool, we can use google map through its A ...

ggplot can draw the map in a more decent way. But the data ggplot deal with will not be our original data. Instead, it will first transform the data u ...

It is very common for us to visualize our results using a map. We can put the data into the map to illuminate the audiences. In this post, I will talk ...

这几天在学习R绘制中国地图以供数据分析之用，然而Mac上R作图的默认设备是Quartz，如果不进行中文字体的设置，是无法出现中文汉字的，会出现诸如框框的情况。为此，我查询了一些资料，主要参考两篇文章，讲了如何进行字体的设置。我把他们列在了最后的参考文献中。 Mac上字体的查看Mac上安装了一些中文字 ...

Today I learned how to build a simple shiny app using the package of “shiny” developed by RStudio. I must admit that this is a wonderful package which ...

这篇教程我们主要来讨论怎么利用VPS来搭建服务器。 （本文主要是对这篇文章进行了一些解释、翻译和拓展，其中一些地方进行了更正，并且加入了一些digitalocean的特色设置，在此声明） 原因我们为什么会有这样一个想法呢？当我们拥有了自己的域名以后，很显然的就会去想，如果我有一个以我的域名命名的邮箱 ...