drwxr xr x

Differences between \ r, \ n, \ r \ n Code: 1: string s1 = "Get used to carriage return and line feed once. \ n. Press A enter key, that is, return "; 2: 3: Console.WriteLine(s1); 4: s1 = "Get used to pressing the carriage return and line feed once. \ r. Press the Enter key, that is, return "; 5: Console.WriteLine(s1); 6: s1 =

1. Install R: Self-Baidu?2.R Console (r console) and R program scripts:Open R Software, you will open the console directly, the console can display the results of the program run, error messages and other information, you can directly enter the action you want to perform and

If you put all of your content in one. In the R document, code readability and logical clarity are far less readable than many. R documentation, but with multiple. The R document calls the function how to call each other. In Matlab, we know that we just have to write different functions. m documents, which can then be called by other main functions. In the

I haven't seen much of Oracle's technical documentation for a long time, and today I read an Oracle Response time optimization and method R. This is the classic book of Optimizing Oracle Performance Classics. The main idea. R represents response time (response times). The specific definition is as follows: 1. Target the tasks this are critical to the business.2. Collect properly scoped, un-aggregated profil

The function of linear regression analysis in R is LM ().(1) Unary linear regressionWe can analyze whether the strength of the alloy is related to the carbon content according to the above data.First read the data into R using the following command:x Y Plot (x, y)Draw to get a linear relationship between x, y two variablesTherefore, the LM () function can be used to fit the line, and the regression function

The latest version of this article has been updated to: http://thinkinside.tk/2013/05/09/r_notes_2_data_structure.html Although R is object-oriented, I personally think that the so-called objects in R are only a structure (struct ). You still need to use the function to operate it. The data structure in R is mainly oriented to some concepts in linear algebra, suc

1. Acquisition and installation of R and Rstudio-Acquisition and installation of RA. https://cran.r-project.org/= R for Windows + base = Download R 3.3.2 for Windows-Acquisition and installation of RStudioA. Integrated development environment (IDE), user interface for RB. https://www.rstudio.com/= Rstudio Download = Rstudio Desktop Open Source License = Installer

0. IntroductionR Analyticflow is a data analysis software using R environment as statistical calculation, the author is Japanese, the copyright belongs to the Japanese ef-prime company. In addition to having an intuitive user interface and flowchart display, R Analyticflow also provides advanced features for the R god. These features enable you to share the proce

fopen (), followed by the argument, For example: R r+ A read-only mode, a read-write mode, exactly what is the difference Ah, why create a back this mode? Can you pass an example to let me know? Reply to discussion (solution) R, can only read fread, cannot write fwriteR+, both can, and overwrite write $FN = ' abc.txt '; The file name to be manipulated Fi

Differences between \ r, \ n, \ r \ n Code: 1: string s1 = "Get used to carriage return and line feed once. \ n. Press A enter key, that is, return "; 2: 3: Console.WriteLine(s1); 4: s1 = "Get used to pressing the carriage return and line feed once. \ r. Press the Enter key, that is, return "; 5: Console.WriteLine(s1); 6: s1 =

With big data in various industries to take root and flourish, the data can dig gold data analysis staff more and more baby, so many programmers want to switch to data analysis, mining technology which strong? Of course, the R language, the fiery degree of R language, from the Tiobe programming language ranking situation is visible. So good at learning of the program staff began the

Note: Be sure to save your workspace before you close R to ensure continuity of learning. The effect of the console commands of the previous data and the associated variables are still stored in memory.1 Accessing Data frame variablesRecommendation: View the variables to be processed in the read.table command execution namesNames (Squid) [1] "Sample" "Year" "Month" "Location" "Sex" "GSI" 1.1 str functionThe STR function can view the

Analysis of open mode of C language fileIn the C language file manipulation syntax, open file files have the following 12 modes, such as: open Mode can only read can only write read Write both text mode R W a r+ w+ A + binary mod

Details and differences of % r and % s in Python, and details of python % r % s Explanation of % r and % s in Python % R uses the rper () method to process objects% S use the str () method to process objects In some cases, the two processes the same result, for example, processing an int-type object. Example 1: print "

1, the typical data analysis process can be summed up as a shape: Note that in the process of model building and validation, data cleansing and modeling may need to be re-established. 2, R language generally use 3, Age 1,3,5,2,One,9,3,9, ,34.4,5.3,7.2,5.2,8.5, 7.3,6.0,10.4,10.2,6.1) mean (weight) SD (weight) cor (age, Weight) plot (age,weight)The above section of code is a basic display, whereSD: To find the standard difference function.Cor: the c

6.3 Interval estimation of two normal populations(1) Two total variance knownThe function Twosample.ci () that calculates the confidence interval in R is as follows, with the input parameter being the standard deviation of sample x, Y, confidence α, and two samples.> twosample.ci=function (X,Y,ALPHA,SIGMA1,SIGMA2) {+ n1=length (x); N2=length (y) + xbar=mean (x)-mean (y) + Z =qnorm (1-ALPHA/2) *sqrt (SIGMA1^2/N1+SIGMA2^2/N2) + C (xbar-z,xbar+z) +}　

How to get fast running code in R Using the vectorization operation Parallel computing for R languages can be used with parallel and foreach packages Speed up R run speed You can also use the Cmpfun () function as a bytecode compiler In addition, C or C + + is called in R You can also use Rprof () to f

Typical data analysis steps:R Language: Language and environment for statistical calculations and plottingData analysis: Statistics, machine learningUse of R1. Case-sensitive, interpreted language2. R Statement Assignment: 3. R Comment: #4. Create vector C ()5. Watch Demo List demo (), Graphic demo demo (graphics)6. Help function7. GETWD () View current working directory, SETWD () set Current working direct

Code: 1: "have been accustomed to the carriage return and change the line once, hit a return, that is back"; 2: 3: Console.WriteLine (S1); 4: "have been accustomed to the carriage return and a change of line once the \ r, hit a return, that is, back"; 5: Console.WriteLine (S1); 6: "have been accustomed to the carriage return and a change of line once \

First, install and load the TM package. 1. Read text x = readLines("222.txt") 2. Build a corpus > r=Corpus(VectorSource(x)) > r A corpus with 7012 text documents 3. Corpus output, saved to Hard Disk > writeCorpus(r) 4. view the Corpus > print(r)A corpus with 7012 text documents> summary(