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.1. R Overview
Select an image from The CRAN (The Comprehensive R Archive networkw.cran.r-project.org-mirrors.html, and then download The appropriate installation
We often copy things on the Internet to the Word document will encounter such a situation, in the change of text, the word will be automatically covered by the new word, just started to think that the cache is slow to respond to the problem, but later found that the cover of all the words disappeared. What the hell is going on here? How do we deal with this probl
I have been in college for two years. I have never been in professional courses since I was a freshman. One of our students is that I started to learn application software, such as Photoshop, 3 DMAX,. In the latter two cases, I went to the library to borrow the 3dmax tutorial and downloaded the software in English version. The trial period is 30 days, imagine mak
effort.After talking so much, someone may ask, what is the use of hard work to become an ideal programmer? Will there be high salaries? No. Can I get promoted? Not necessarily. What about Bai Fumei? It is better to sell dogs.Kazuo once told a story. during the Meiji period, the craftsman was summoned by the emperor. a
At present, many netizens in the use of Apple Computer Mac, small set on the Mac touch screen function of praise, very suitable for the outfit force, the younger sister. However, recently, a sister paper want to borrow small series of the Mac big screen plug hard disk, look inside the HD beauty map, but, hard drive has been unable to identify, really let small make up a fool die! In order for such things not to happen again, the small set decided to study the MAC does not recognize the solution
If you have used Canon's SLR camera, will not be unfamiliar to the Cr2 file, as a Canon camera raw files of an archive format, Cr2 in many photography enthusiasts have a very important position.
What file is Cr2?
The CR2 format is an archive format for Canon camera RAW files. The raw file contains all the photo information of the original image file before en
What kind of tool is Usboot?
I believe some users will ask, if you have only heard the U disk started, and thought that it is a very high-end function, only special motherboards only support. In fact, as long as the aid of usboot this tool, Usboot make U disk Startup disk is very simple, a few minutes to fix. So, Usbo
650) this.width=650; "src=" http://183.61.143.148/group1/M00/02/69/tz2PlFRNq0SxDd5HAAAseD8CvfU212.jpg "/>what is the PHP framework? This course is a basic PHP tutorial that will show you how to learn PHP. The PHP Framework provides a basic framework for building Web applications, simplifying the process of writing Web
What is the TCP/IP protocol?
This tutorial on TCP/IP is mainly considering that the Internet is almost entirely based on TCP/IP protocol, so what we should understand is
Database optimization tutorial (8) under what circumstances should indexes be used and indexes be optimized?Iii. Index
5. Under what circumstances should indexes be used?
Since the index has a cost, you should not use it without using the index.
1) do not use indexes for fields with poor data uniqueness
For example, gender only has two possible types
Win7 There are many versions, and in the installation of Win7 system, usually we choose to install the flag version, then for the Win7 Professional Edition you certainly do not understand. Today we'll simply compare the differences between the two versions.
1
The purpose of Win7 Professional Edition:
Win7 professional layout to enthusiasts and small business users to meet the needs of office development, including enhanced network functions, such as Active Directory and domain support, Remote
What is the Grapher under Mac? Grapher is an application that creates equation graphics, so you can visualize the results. You can enter a variety of mathematical functions to view them in two-dimensional graphic mode. You can even animate a graphic to make a movie file. As long as you enter your function model, Grapher will be able to create relevant graphics fo
notebook XP users after the system reboot, found the computer desktop taskbar in the Fast launch bar disappeared, many users in this case, choose not to take care of it, because there is no Quick Launch bar does not affect the user's normal use of the computer too much. But what should we do if we want to get back to the vanishing fast launch bar? The following is
When we turn on the camera, we sometimes encounter the prompt "camera is occupied" and cannot preview the local image. What do we do?
The reason for analysis should be that the third-party program occupies the camera, or is optimized by other optimization software, causing the camera to be unusable.
Workaround:
Windows 7 System:
1. Check the Device Manager, i
Http://blog.csdn.net/youge/archive/2005/11/15/529805.aspx
Quote:
What is XDoclet?If you have used XDoclet or read the first XDoclet tutorial, skip this page.XDoclet makes it easier to automatically generate deployment descriptors. XDoclet is a code generation utility that allows you to add metadata to languag
supervised by a third party by the Beijing Software Association Education and Training Committee (ETC, there will be no situations where students will be asked to repay their work if they fail to reach a minimum of 6 K employment.
What is the teaching mode of a good programmer's mentor system?
The special training camp for good programmers is the first in the i
Win8 Customer Preview version how to install? The Win8 installation tutorial is almost the same as the Win7 installation tutorial, so there are more than 10 ways to install Win8! The author introduces the highest success rate in this way-with u disk into the WinPE to install Win8 (with U disk mounted Win8)!
The Win8 installation
What if the MathType tag bar is gone?
MathType Tag Disappearance Example
The workaround process is as follows:
1. Open the MathType software window, either by double-clicking the formula or by "insert"--"object" from Word, so that MathType is in edit state.
2. In the MathType Edit Window menu, select "View"-"larg
function Test () {... return $result;} function test1 () {... return $result;} .... function testn () {.... return $result;}. Class Funs{static function Test () {... return $result;} static function Test1 () {.... return $result;} .... static function Testn () {.... return $result;}}. $a = Test (); $b = Funs::test () ...
What is the difference between a separate function written outside a class and a
Summary
I wanted to write a tutorial on port for a long time, and I finally put it into practice today. In fact, there are many tutorials on port introduction on the Internet, but I haven't seen any articles that really tell you what port is (maybe I didn't really see it). If you have read a lot of port tutorials, what
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