elements beginning with r

The latest version of this article has been updated to http://thinkinside.tk/2013/05/03/r_notes_1_what.html    While learning about quantum investment, I found R (www.r-project.org ). What is R? Before you start, let's take a look at the magic of R.

    Transferred from: blog.csdn.net/jobchanceleo/category/510850.aspx     As the core of the company, the R & D team undertakes the goal of making money for the company by completing the project. The R & D personnel did not reduce the turnover rate

Recently began to learn the R language, the study notes and small friends to share, welcome to ExchangeR Origin:R is an implementation of the S language. s language is an interpretive language developed by T-Bell Labs for data exploration,

As the core of the company, the R & D team undertakes the goal of making money for the company by completing the project. The R & D personnel did not reduce the turnover rate while being highly valued by the company. Problems and phenomenaWe believe

In view of the non-persistent and capacity constraints of the memory, an effective data processing tool must be able to use external data: be able to obtain a large amount of data from the outside, and be able to save the processing results. R

ObjectiveAt the beginning of the contact with the R language, you will hear a variety of R language use skills, the most important one is not to use the loop, the efficiency is particularly low, to use vector computing instead of cyclic

Summary of \ r and \ n \ R indicates carriage return and \ n indicates line feed. In Windows, the input key will automatically become \ r \ n. In Windows, \ r \ n is also required for line breaks. Why do we need two characters? Because Windows

I have been engaged in mobile Web Front-end development for nearly a year. In this short period of time, I learned from the experiences of previous generations, such as the circle center and yuyu, and made constant explorations and practices,

To recommend a R language in the quantitative financial aspects of the Good book, is my teacher prepared, and I am very fortunate to participate in the preparation of this book process. The book was officially online in May 2015, and it has been

1: By ID2: By name3: Through XPath3.1 Through the absolute path of the XPath, from the outermost start to findsuch as/html/body/div[1]/div[4]/div[2]/div/form/span[1]/input3.2 Relative paths through XPath3.2.1 FindElementsItselfXPath can also take