+ : one or more of the preceding expression should be present > # Does "Maryland" contain one or more of "a" ? > grepl("a+", "Maryland") [1] TRUE > grepl("x+", "Maryland") [1] FALSE * : zero or more of the preceding expression is present. > # Does "Maryland" contain z...
2: CRAN packages only 3: None 4: stringi (1.4.4 -> 1.4.5) [CRAN] 5: zoo (1.8-6 -> 1.8-7) [CRAN] Enter one or more numbers, or an empty line to skip updates: WARNING: Rtools is required to build R packages, but is not currently installed. Please download and install Rtools...
14 Assessing theAssumption of Normality Difficult to find a good overall test of joint normality in more than two dimensions. Investigations on normality will focus on the behavior of observations in one or two dimensions (e.g. marginal distributions and scatter plots). Non...
downloads the packages from the repositories and installs them. (If the library is omitted it defaults to the first directory in.libPaths(), with a message if there is more than one.) Iflibis omitted or is of length one and is not a (group) writable directory, the ...
R is an open source programming language and software environment for statistical computing and graphics. It is one of the primary languages used by data scientists and statisticians alike. It is supported by the R Foundation for Statistical Computing and a large community of open source developers...
After installation is complete, you need to performone more stepto be able to compile R packages: you need to put the location of the Rtoolsmake utilities(bash,make, etc) on thePATH. The easiest way to do so is create a text file.Renvironin your Documents folder which contains the fol...
Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for an HTML browser interface to help. Type 'q()' to quit R. > 现在,您可以在R语言提示符...
sourcing into the current environment only the variables explicitly specified in the module.exports or exports list variable.If thefile was already sourced,the result of the earlier sourcing is returned to the caller.License MIT+file LICENSE URL https://github.com/rickwargo/lrequire BugRepor...
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