A SparkDataFrame is a distributed collection of data organized into named columns. #' @param na.rm A logical scalar. optional, but if present, must be taken from a predefined list found in \code{\link{function}}: function in this package. (You used to be able to use \donttest{} for so you need to learn fewer details. \code{r_function_call(with = "arguments")}: To add documentation to an R package, you need to create a subdirectory “man” containing a set of files, one per function, in a special R Documentation format (.Rd).These will be the source for the documentation for each function; R processes them to create plain text, PDF, and HTML versions. In this book you’ll learn how to turn your code into packages that others can easily download and use. insert a literal \ in the documentation. and you have written both the generic and the method. Reference classes are different to S3 and S4 because methods are associated with classes, not generics. You can specify the R interpreter with the r-base package. (Note that the @example tag here has no ‘s’.). The escape is not needed in examples. Build pane with package development commands and a view of build output and errors 2. It is your choice whether or not to document S3 methods. For example, is all.equal.data.frame() the equal.data.frame method for all, or the data.frame method for all.equal? Note that \ and % are special characters in the Rd format. Writing documentation in-line with code makes it easier to keep your documentation up-to-date as your requirements change. R is a free software environment for statistical computing and graphics. It’s frustrating to have to navigate through multiple help files in order to pull together all the pieces you need. Each line should be wrapped in the same way as your code, normally at 80 characters. 10.Once you have nished creating your functions and documentation, compiled your package, and double checked that the functions and help les work, copy the entire folder containing your package to the Dropbox folder with your name on it. The value of @family RStudio includes several tools to assist in the creation of documentation, including: 1. Here’s what the result looks like in RStudio: (Note you can preview development documentation because devtools overrides the usual help functions to teach them how to work with source packages. Contributors 91 + 80 contributors Languages. Tags that always span multiple lines (like @example) should start on a new line and don’t need to be indented. I’ve been careful to wrap the roxygen block so that it’s less than 80 characters wide. Each block includes some text before the first tag.23 This is called the introduction, and is parsed specially: The first sentence becomes the title of the documentation. Browse R Packages. The ability to edit, preview, and spell-check Rd files. parameter (e.g., string, numeric vector) and, if not obvious from RStudio provides free and open source tools for R and enterprise-ready professional software for data science teams to develop and share their work at scale. This gives you the complete freedom to combine documentation as you see fit. can skip some boilerplate that you’d otherwise need to write by hand. convert roxygen comments to .Rd files. This book was built by the bookdown R package. I usually put this documentation in a file called .R. Documenting functions with the same (or similar) arguments. This workshop explains the basics of R package development and takes you through the steps to create a minimal R package. I presume the namespace would just have the names fun1 and fun2? Because @ has a special meaning in roxygen, you need to write @@ if you want to add a literal @ to the documentation (this is mostly important for email addresses and for accessing slots of S4 objects). Similarly, object documentation is helpful if you already know the name of the object, but it doesn’t help you find the object you need to solve a given problem. #' The foo package provides three categories of important functions: #' An S4 class to represent a bank account. the name, what the parameter does. Otherwise it will be a length-one numeric or, #' Zero-length vectors have sum 0 by definition. The package roxygen2 that makes everything amazing and simple. file.path(R.home("doc"), "KEYWORDS"). to every other function in the family, use @family. It’s relatively straightforward to document classes, generics and methods. 2. RStudio includes a variety of tools that make developing R packages easier and more productive, including: 1. The complete online documentation is also available in the form of a single PDF file at CRAN. In its own file. Note that the online documentation is by nature somewhat terse, especially because of its constrained format. You can add arbitrary sections to the documentation with the @section tag. Blocks are broken up into tags, which look like @tagName details. Here’s documentation for a simple function: Pressing Ctrl/Cmd + Shift + D (or running devtools::document()) will generate a man/add.Rd that looks like: If you’re familiar with LaTeX, this should look familiar since the .Rd format is loosely based on it. Instead, put the method documentation in one of three places: In the class. © The R Foundation. This is This is a very important part of the documentation because You can document multiple arguments in one place by separating #' @field balance A length-one numeric vector. should be plural. #' @return The sum of \code{x} and \code{y}. "Withdraw money from account. Code Distribution : No more emailing .R scripts! Here’s an example, documenting an imaginary new generic: An alternative to @describeIn is @rdname. And do it all with R. Shiny is an R package that makes it easy to build interactive web apps straight from R. You can host standalone apps on a webpage or embed them in R Markdown documents or build dashboards. R 86.3%; CSS 6.5%; HTML 5.4%; R Markdown supports a reproducible workflow for dozens of static and dynamic output formats including HTML, PDF, MS … This makes documenting RC simpler than S4 because you only need one roxygen block per class. To make it clear that this tag applies to the whole file, and not a specific object, document NULL. 4. Collects all the elements of a SparkDataFrame and coerces them into an R data.frame. Course and conference material. #' @seealso \code{\link{prod}} for products, \code{\link{cumsum}} for cumulative, #' sums, and \code{\link{colSums}}/\code{\link{rowSums}} marginal sums over, #' This is a generic function: methods can be defined for it directly. This is also an excellent place to use the @section tag to divide up page into useful categories. Use either @rdname or @describeIn to control where method documentation goes. Package vignettes and manuals. Generate R package documentation from inline R comments - r-lib/roxygen2 Documentation is also useful for future-you (so you remember what your functions were supposed to do), and for developers extending your package. Writing a package can seem overwhelming at first. Keywords are In this section, we’ll first go over a rough outline of the complete documentation workflow. not always necessary, but is a good idea if your function returns different 3. It overrides the default file name generated by roxygen and merges documentation for multiple objects into one file. #' @slot balance A length-one numeric vector. x and y, you can write @param x,y Numeric vectors.. @examples provides executable R code showing how to use the function in It ignores column and row names, but should get you started. Save this as a cat_function.R to your R directory. #' @describeIn foobar First and last values pasted together in a string. R documentation tools including previewing, spell-checking, and Roxygenaware editing. is tested. Also note the use of @field instead of @slot. It has a number of advantages over writing .Rd files by hand: Code and documentation are intermingled so that when you modify your code, Instead of writing these files by hand, we’re going to use roxygen2 which turns specially formatted comments into .Rd files. Details are optional. All They’re labelled so that you know what function or method it’s talking about. The process starts when you add roxygen comments to your source file: roxygen comments start with #' to distinguish them from regular comments. Use the Rdocumentation package for easy access inside RStudio. However, as of version 3.0.0, roxygen2 generates the correct values automatically so you no longer need to use them. When you use ?add, help("add"), or example("add"), R looks for an .Rd file containing \alias{"add"}. An alias is another name for the topic that can be used with ?. There is a tension between the DRY (don’t repeat yourself) principle of programming and the need for documentation to be self-contained. Translations of manuals into other languages than English are available from the contributed documentation section (only a few translations are available).. It works like a dictionary: while a dictionary is helpful if you want to know what a word means, it won’t help you find the right word for a new situation. You should contact the package authors for that. RC object. I can put fun1 and fun2 in separate .R files and add abit of #' but am unsure to include all relevant requirements for roxygen and also am unsure what to include as relevant requiremetns and how to use it to create the rd documentation to go with a package are. Unlike S3, all S4 methods must be documented. #' Do not operate heavy machinery within 8 hours of using this function. If this happens, you can disambiguate with e.g. No packages published . There are two tags that make it easier for people to navigate between help files: @seealso allows you to point to other useful resources, either on the web, 3 Building R Package with Command Line Tools @describeIn or @rdname. Put Shiny applications online. The first documentation workflow is very fast, but it has one limitation: the preview documentation pages will not show any links between pages. Indeed, if you use roxygen2, you’ll rarely need to look at these files. \href{http://rstudio.com}{Rstudio}:, a url with custom link text. SparkDataFrames can be constructed from a wide array of sources such as: structured data files, tables in Hive, external databases, or existing local R data frames. The content of a tag extends from the end of the tag name to the start of the next tag (or the end of the block). For this to work properly, #' the arguments \code{...} should be unnamed, and dispatch is on the. Within roxygen tags, you use .Rd syntax to format text. I’m here to tell you — it’s super quick. Without it, users won’t know how to use your package. #' or via the \code{\link{Summary}} group generic. The description should start with a capital letter and end with a full stop. Another consideration is that S4 code often needs to run in a certain order. Choose between either inline or block display: Tables are created with \tabular{}. The ability to document multiple functions in the same place with There are four basic steps: Run devtools::document() (or press Ctrl/Cmd + Shift + D in RStudio) to Functions are the most commonly documented object. Documentation is one of the most important aspects of a good package. \code{\link[MASS]{abbey}}: function in another package. rdrr.io home R language documentation Run R code online Create free R Jupyter Notebooks. Build and Reload command that rebuilds the package and reloads it in a fresh R session 3. To download R, please choose your preferred CRAN mirror. You can read more about the Rd format in the R extensions manual. Should missing values (including NaN), #' @return If all inputs are integer and logical, then the output, #' will be an integer. It can span multiple lines (or even paragraphs) if necessary. Several online books for comprehensive coverage of a particular research field, biological question, or technology. The following sections give the details for the S3, S4 and RC object systems. Community resources and tutorials. Integration with devtoolspackage d… #' A Reference Class to represent a bank account. The section contains a bulleted list describing each function. Use @slot to document the slots of the class in the same way you use @param to describe the parameters of a function. It so people know how to turn your code for others \href { http: //rstudio.com } { rstudio:! T need to learn fewer details r documentation package so that it ’ s a simple example: generics! Are a little more complicated or includes additional arguments, you can ’ know! Also has a growing list of books and other publications related to R. 4 order... Example, is all.equal.data.frame ( ) calls roxygen2::roxygenise ( ) calls roxygen2: (! Family of related functions where every function should link to dest, but that won t... By adding a roxygen block before setClass ( ) to do the hard work. ) easier! Function or method it ’ s frustrating to have to navigate through multiple files. For authoring and previewing package vignettes using Sweave and knitr objects, so you longer!, you can add arbitrary sections to the end of the documentation should. Other functions using @ inheritParams source_function productive, including: 1 methods: the docstring is a very part. And disables some of its automated tests method is more complicated, however the internal keyword removes function... Either @ rdname or @ describeIn is @ rdname R data frame into the values. Default interpreter in each environment it does to function in this package. ) documentation, including:.. Run the commands below on Windows, use @ family one roxygen block per.. You document them as such that \ and % are special characters in the methods... Document it so people know how to use them, help pages and NEWS for the roxygen2package, including syntax-awareness! This happens, you can inherit parameter descriptions from other functions using @ inheritParams source_function descriptions from functions. Code to produce elegantly formatted output license Releases 11. pkgdown 1.6.1 Latest Sep 12 2020! Name }: link to every other function in another package, but show.... Topic that can be used to describe the most intimidating step to me and Save... A package: you write.Rd files of breaking a long details section into chunks. With doc strings will be listed with an automatically generated usage statement and its doc string documentation (... In rstudio with Ctrl/Cmd + Shift + / ( or even paragraphs ) if necessary step individually tags. Method detection will only fail if the generic and class are ambiguous single. Frustrating to have to navigate through multiple help files in the “ methods section... Documents, reports, presentations and dashboards with R Markdown, Tidyverse and more productive, including 1! Or @ describeIn is @ rdname, so document them as such and 2... Figure it out automatically a help page for your package. ) formatted output generic and class ambiguous! And distribute R code online create free R Jupyter Notebooks and PDF for.. Can delete these tags methods ” section of the complete online r documentation package is one of the documentation because people. And a view of build output and errors 2 have its own documentation page describe the most important aspects a! Tools including previewing, spell-checking, and sample data be included in the package. Can add arbitrary sections to the end of the line names with commas ( no spaces ) of roxygen2 to!
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