But setting the output to a text file and running Pandoc on that to create a HTML, odt, docx or other document in one go is also possible. Many, many thanks are due to the developers of bootstrap-select for their hard work and excellent documentation. LaTeX option. You can use Markdown in the Markdown Block. The key is the use of braces following by the CSS id to add to the HTML file. Formatting text in Markdown has a very gentle learning curve. is there any effort to add a detail feature into markdown spec with some simple syntax? in vim i often use the following structure: {{{ - section header introductory text {{{ + subsection 1 subsection 1 test possible sub-subsections }}} {{{ - subsection 2 subsection 2 text }}} }}}. For R Markdown, the default graphics device is png. Additional command line options to pass to pandoc. slideContent. For supported syntax, see Syntax guidance for Markdown files, widgets, wikis, and pull request comments. Beautiful graphs in notebooks are great, but I want my explanatory text to look good too! Somehow I can't remember all the Markdown tags, so I created this cheatsheet. I tried color gray [markdown| Stuff |] but that changes the color of the background, not of the text. R Markdown provides an unified authoring framework for data science, combining your code, its results, and your prose commentary. Applying Styles Globally. Since we modified the font color to ‘white’ in the MS Word template, the specification after the Markdown code (Page Break) will not appear in the final document. Create rainbow text effects and more for your blog or forum. We limit ourselves to base R graphics in this tutorial, therefore we use par(), the function that queries and sets base R graphical parameters. Changing font sizes of HTML ouput in Rmarkdown. md) and more. I am currently compiling reports using RMarkdown (in RStudio) but am unsure how to centre and bold one of my headings? For example, my document looks like this:. Markdown extensions to be added or removed from the default definition or R Markdown. , plain text, list items, links, etc. You can create a slide show broken up into sections by using the # and ## heading tags (you can also create a new slide without a header using a horizontal rule (---). 4 Scrollable code blocks When you have large amounts of code and/or verbatim text output to display on an HTML page, it may be desirable to limit their heights, otherwise the page may look overwhelmingly lengthy, which will make it difficult for those who do not want to read the details in the code or its text output to. It has a number of great features: easy syntax for a number of basic objects; code and output are in the same place and so are. In this tutorial, we will render or knit an R Markdown document to a web friendly, html format using the R knitr package. Here's a quick example of some pandoc-markdown -formatted text: first as the source you'd put into your file, then rendered as html. Again, in the Styles Menu, we're going to scroll down and find the option here for Heading 2. The first official book authored by the core R Markdown developers that provides a comprehensive and accurate reference to the R Markdown ecosystem. It doesn’t do anything fancy like change the font size, color, or type. Pandoc includes a Haskell library and a standalone command-line program. 50 Actualizado: 8/14 RStudio® es una marca registrada de RStudio, Inc. You get less visual control than with a tool like Keynote or PowerPoint, but automatically inserting the results of your R code into a presentation can save a huge amount of time. 1 Introduction. Tips and tricks for working with images and figures in R Markdown documents Posted on June 19, 2017 by [email protected] I tried color gray [markdown| Stuff |] but that changes the color of the background, not of the text. How to provide color to inline and block text in Rmarkdown? How to provide color to inline and block text in Rmarkdown? In R programming language,. The big advantage was and still is that it isn't necessary anymore to use LaTex, which has a learning curve to learn and use. The list of languages that are supported can be found here. runs the R code, embeds results and text into. ```{r summary_plot, fig. Font Color¶. com rmarkdown 0. These documents can be dynamic (interactive) or static. You can even use R Markdown to build interactive documents and slideshows. if we set dev='CairoPDF', the function with the. Rmd file to a. 5 Markdown syntax. This course shows how to design high-quality reports and presentations, including interactive web experiences and printable PDFs, using R Markdown and RStudio, the authoring framework designed specifically for data science. Formatting your text with Markdown. Headings: Use #s followed. This will not center the caption. Text can be added to Jupyter Notebooks using Markdown cells. 2 Change the default plotting symbol to a solid circle. This is kind of a pain because you will need to provide the image() function a matrix to generate an appropriate fill-colour and a different matrix for the data to be written in each cell. Although this solution is less than ideal, the resulting document is quite usable and it correctly identifies the tables and figures. Linux Latex Markdown In this post, I am gonna show you how to write Mathematic symbols in markdown. See RStudio's R Markdown lessons for other R Markdown capabilities. Rmd file to a. output: tufte::tufte_html: tufte_variant: "envisioned" To see the R Markdown source of this example document, you may follow this link to Github , use the wizard in RStudio IDE ( File -> New File -> R Markdown -> From Template ), or open the Rmd. These are the elements outlined in John Gruber's original design document. sty files, which allow full customization of the fonts and styles of a PDF document. R Markdown supports a reproducible workflow for dozens of static and dynamic output formats including HTML, PDF, MS Word, Beamer, HTML5 slides, Tufte-style handouts, books. The first row is always the header followed by an extra line with dashes "-" and optional colons ":" for forcing column alignment. The package also allows for the formatting of text with CSS as well. Markdown is a simple formatting syntax for > authoring web pages (click the **Help** toolbar button for more details on > using R Markdown). For R Markdown, the default graphics device is png. All text from >>> until the end of the message will be included in the quote. When compiling R Markdown documents, the code components can be evaluated so that both the code and its output can be included in the final document. Dillinger is an online cloud based HTML5 filled Markdown Editor. Press question mark to learn the rest of the keyboard shortcuts. If you are creating an R Markdown document or Shiny application, you may want to apply your dygraphs CSS globally to the page or application rather than attaching it to each plot. Table 1: My caption text. The default stylesheet for HTML in most browsers is rather unattractive, so you may want to use a custom stylesheet by either linking to an external stylesheet or including a If you want to increase the size of a specific element (e. Seems like I can use {. You can write Markdown inside Swipe or in your favourite text editor. Since the initial description of Markdown contained ambiguities and unanswered questions, the implementations that appeared over the years have subtle differences and many come with syntax extensions. The highlighted region will be displayed with a bold font. Here we show some simple text with a bulleted list of four links. But setting the output to a text file and running Pandoc on that to create a HTML, odt, docx or other document in one go is also possible. Ever string that started with a markup sign was a markup start, and every string that ended with a markup sign was a markup end. This will not center the caption. Precisely speaking, it is Pandoc's Markdown. R Markdown Cheat Sheet. GFM Markdown table syntax is quite simple. The package also allows for the formatting of text with CSS as well. Norbert Köhler does not work or receive funding from any company or organization that would benefit from this article. The color demos below will be more effective if the default plotting symbol is a solid circle. The most complete documentation/example is " Markdown Cheatsheet ", and it illustrates that this element If you want to increase the size of a specific element (e. The genotype data is quite complete. Repeating my original problem — I want to have syntax highlighting for SAS code within my R Markdown documents. Provides a decent Markdown color scheme (light and dark) with more robust syntax highlighting and useful Markdown editing features for Sublime Text. There are `r nphe(sug)` phenotypes, and genotype data at `r totmar(sug)` markers across the `r nchr(sug)` autosomes. Now that the Markdown text is highlighted a lot better, let's look at how fenced code blocks are displayed. To create a nested list using the web editor on GitHub or a text editor that uses a monospaced font, like Atom, you can align your list visually. md) and more. See RStudio's R Markdown lessons for other R Markdown capabilities. LaTeX option. At that point, your document can be viewed in a web browser or combined with a style sheet and printed. Discord uses some elements of Markdown but not all. I am currently compiling reports using RMarkdown (in RStudio) but am unsure how to centre and bold one of my headings? For example, my document looks like this:. You can create a slide show broken up into sections by using the # and ## heading tags (you can also create a new slide without a header using a horizontal rule (---). color text, print a README file without all of the chrome). R Markdown is a program for making dynamic documents with R. The key is the use of braces following by the CSS id to add to the HTML file. Markdown is a a simple syntax to write rich formatted text on the web. Using R Markdown for Class Reports - stat. For example, to use the svg device (for Scalable Vector Graphics , which may look better in a web page as they can be scaled without loss of quality), you would use dev='svg' , as follows:. 2 Change the default plotting symbol to a solid circle. A common use for popups is to have them appear when markers or shapes are clicked. Also in 2012, R Markdown was created as a variant of Markdown that can embed R code chunks and that can be used with knitr to create reproducible web-based reports. This is addition to the text formatting mentioned above. The first link style is called an inline link. To create an ioslides presentation from R Markdown you specify the ioslides_presentation output format in the front-matter of your document. • CC BY RStudio • [email protected] A line or two of R code is all it takes to produce a D3 graphic or Leaflet map. ```{r summary_plot, fig. How to provide color to inline and block text in Rmarkdown? How to provide color to inline and block text in Rmarkdown? In R programming language,. You can also insert divs with your own styling such as background colors. Markdown is probably the most commonly-used plain text markup used online, and is easy to get started with. Sync with Dropbox, Github, Google Drive or OneDrive. For R Markdown, the default graphics device is png. GitHub Gist: instantly share code, notes, and snippets. Line breaks in markdown. Markdown is a simple formatting syntax for > authoring web pages (click the **Help** toolbar button for more details on > using R Markdown). sty files, which allow full customization of the fonts and styles of a PDF document. Plotly's R library is free and open source! Get started by downloading the client and reading the primer. 0), the following font characteristics may be set:. There are many ways to customize pandoc to fit your needs, including a template system and a powerful system for writing filters. You can create a slide show broken up into sections by using the # and ## heading tags (you can also create a new slide without a header using a horizontal rule (---). Note: Markdown language is an advanced modification that falls out of the scope of Squarespace support. Contribute. knitr can be used to convert R Markdown files to many different formats including: html, pdf, GitHub markdown (. BBcode and HTML text effect generator. It doesn’t do anything fancy like change the font size, color, or type — just the essentials, using keyboard symbols you already know. For more complete info, see John Gruber's original spec and the Github-flavored Markdown info page. R Markdown allows you to mix text, R code, R output, R graphics, and mathematics in a single document. R Markdown referenciaReferencia lee mas en rmarkdown. You can also insert divs with your own styling such as background colors. Tips and tricks for working with images and figures in R Markdown documents Posted on June 19, 2017 by [email protected] extra_dependencies. Example: $\sum_{n=1}^{10} n^2$ is rendered as \(\sum_{n=1}^{10} n^2. Sync with Dropbox, Github, Google Drive or OneDrive. Markdown extensions to be added or removed from the default definition or R Markdown. A line or two of R code is all it takes to produce a D3 graphic or Leaflet map. Currently (R 1. There are many ways to customize pandoc to fit your needs, including a template system and a powerful system for writing filters. This Markdown cheat sheet provides a quick overview of all the Markdown syntax elements. Set text color by using This text will be red. Set background color by using This text will be on. 5 Presentations. Results in the following displayed in the document. The following example shows how to flag a page break between two paragraphs in a. Markdown is often used to format readme files, for writing messages in online discussion forums, and to create rich text using a plain text editor. To some degree, Markdown reflects the philosophy of Stoicism: the “natural world” consists of plain text, and you should not be controlled by the desire for (visual) pleasure. To enclose a segment of text in blockquotes, one must prefix each written line with a greater-than sign. Color, as a topic, extends beyond the Font object; font color is just the first place it's come up. We see that this is an intercross with `r nind(sug)` individuals. rmd', output_format=c('html_document','pdf_document')) I get two files: tmp. Take this example table, which summarizes … three different methods for making tables in R Markdown. class: center, middle, inverse, title-slide # Extending R Markdown ### Hao Zhu ### 2019-01-16 --- class: center, middle, inverse ## [http://bit. A Markdown formatted file is in essence a plain text file that may contain a number of formatting marks. It has a number of great features: easy syntax for a number of basic objects; code and output are in the same place and so are. ```{r summary_plot, fig. There’s text chat, but there are no built-in color commands and, at first glance, no way to do anything “fancy” with your text. … This information could have been written in bullet points … or in prose, but by using a table, … it's easier for the reader to compare the different methods … and count, for instance, how many methods there are … for creating. So, let's open up our R Markdown file, … and let's zoom in on the file … by pressing ctrl + shift + 1. When compiling R Markdown documents, the code components can be evaluated so that both the code and its output can be included in the final document. But first: Where do you define custom styles? Styles that you will use throughout the presentation should be defined at the very top of your RPres file, before the title slide. Formatting your text with Markdown. Text before page break. 1 ioslides presentation. Markdown is a simple way to format text that looks great on any device. output: tufte::tufte_html: tufte_variant: "envisioned" To see the R Markdown source of this example document, you may follow this link to Github , use the wizard in RStudio IDE ( File -> New File -> R Markdown -> From Template ), or open the Rmd. Set background color by using This text will be on. Unfortunately this does not work as the highlighting is being done by pandoc and not knitr. md (markdown file). For example, to use the svg device (for Scalable Vector Graphics , which may look better in a web page as they can be scaled without loss of quality), you would use dev='svg' , as follows:. You can choose a different device using the chunk option dev. Markdown is a simple way to format text that looks great on any device. There's text chat, but there are no built-in color commands and, at first glance, no way to do anything "fancy" with your text. tex conversion. You can also insert divs with your own styling such as background colors. R Markdown in corporate settings. You'll also learn how to use the base themes of ggplot2 and to create your own theme. R Markdown: How to number and reference tables; R Markdown: How to insert page breaks in a MS Word document; Disclosure. com · 10 Comments Writing reports in R Markdown allows you to skip painful and error-prone copy-paste in favor of dynamically-generated reports written in R and markdown that are easily reproducible and updateable. The first row is always the header followed by an extra line with dashes "-" and optional colons ":" for forcing column alignment. R Markdown relies on pandoc for its syntax highlighting. These documents can be dynamic (interactive) or static. layout: true. This cheatsheet is specifically Markdown Here's version of Github-flavored Markdown. Writing your thesis with R Markdown (5) - The thesis layout Posted on March 30, 2016 by rosannav This is the fifth and last post in a short series of tutorials to write your thesis in R Markdown. … This information could have been written in bullet points … or in prose, but by using a table, … it's easier for the reader to compare the different methods … and count, for instance, how many methods there are … for creating. Currently (R 1. The remainder of this article describes features that are specific to Distill websites. It doesn't do anything fancy like change the font size, color, or type — just the essentials, using keyboard symbols you already know. The default stylesheet for HTML in most browsers is rather unattractive, so you may want to use a custom stylesheet by either linking to an external stylesheet or including a block in the exported HTML itself. output: tufte::tufte_html: tufte_variant: "envisioned" To see the R Markdown source of this example document, you may follow this link to Github , use the wizard in RStudio IDE ( File -> New File -> R Markdown -> From Template ), or open the Rmd. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML. Use a productive notebook interface to weave together narrative text and code to produce elegantly formatted output. A Markdown formatted file is in essence a plain text file that may contain a number of formatting marks. There are many flavors of Markdown invented by different people, and Pandoc’s flavor is the most comprehensive one to our knowledge. Enter the text and markdown syntax into the configuration the configuration dialog. This can be useful if you want to use # for color hex codes. The first official book authored by the core R Markdown developers that provides a comprehensive and accurate reference to the R Markdown ecosystem. The most complete documentation/example is " Markdown Cheatsheet ", and it illustrates that this element If you want to increase the size of a specific element (e. There are many flavors of Markdown invented by different people, and Pandoc's flavor is the most comprehensive one to our knowledge. I tried color gray [markdown| Stuff |] but that changes the color of the background, not of the text. These documents can be dynamic (interactive) or static. output: tufte::tufte_html: tufte_variant: "envisioned" To see the R Markdown source of this example document, you may follow this link to Github , use the wizard in RStudio IDE ( File -> New File -> R Markdown -> From Template ), or open the Rmd. We see that this is an intercross with `r nind(sug)` individuals. The output is set to stdout by default, which means that the resulting text is written to the R console. Essentially, I would like the table of contents to have a different font family (Gotham Light) from the primary document font (Gotham Book), and I would also like to make it smaller than the default font size. I also read that footers can be added (if included in the file definition 4. Inserting Captions and Cross References in a R Markdown Document Andy Lyons In the next plot, we'll add the col argument, which allows us to change the font color. R Markdown combines markdown (an easy to write plain text format) with embedded R code chunks. This cheatsheet is specifically Markdown Here's version of Github-flavored Markdown. In this tutorial, we will render or knit an R Markdown document to a web friendly, html format using the R knitr package. While writing out the raw HTML and JavaScript to accomplish this worked in R Markdown, I found this tedious, so I decided to author bsselectR, an htmlwidget to do this automatically with R code. Hello, so I created an R markdown file as in File -> New File -> R Markdown. Sync with Dropbox, Github, Google Drive or OneDrive. Rmd file to a. 0 or higher. Formatting your text with Markdown. For a line break, add either a backslash \ or two blank spaces at the end of the line. Explore custom styles in R Markdown, including. This sentence includes super^ script (but with no spaces after the caret; Like strikethrough, the superscript syntax doesn't play nicely with escape sequences). Then, remember to save the finished document in. Use this cheat sheet for syntax reference in the Markdown language. com • 844-448-1212 • rstudio. The default stylesheet for HTML in most browsers is rather unattractive, so you may want to use a custom stylesheet by either linking to an external stylesheet or including a If you want to increase the size of a specific element (e. R Markdown is a program for making dynamic documents with R. But first: Where do you define custom styles? Styles that you will use throughout the presentation should be defined at the very top of your RPres file, before the title slide. Again, in the Styles Menu, we're going to scroll down and find the option here for Heading 2. There are minor variations and discrepancies between Markdown processors — those are noted inline wherever possible. HTML widgets can be used at the R console as well as embedded in R Markdown reports and Shiny web applications. Could anyone help? I tried an if statement where the return value is latex. Convert HTML to Markdown. Use multiple languages including R, Python, and SQL. The genotype data is quite complete. the detail construct is plain html, it is not markdown. This document will introduce participants to the basics of R Markdown. You can also use R Markdown to produce presentations. Get out there and highlight your statements! PS: Spoilers are a kind of Markdown formatting, too!. Basic Syntax. This past summer when the twin cities R user group was starting to get back up and running, I offered to present on some R related things that I was working on. changing colors of selected text in R markdown There does not appear to be any easy way to do this. Many, many thanks are due to the developers of bootstrap-select for their hard work and excellent documentation. row_label_position. Then, remember to save the finished document in. 4 Scrollable code blocks When you have large amounts of code and/or verbatim text output to display on an HTML page, it may be desirable to limit their heights, otherwise the page may look overwhelmingly lengthy, which will make it difficult for those who do not want to read the details in the code or its text output to. I don't use R Markdown for my blog, because I prefer to separate my analytical scripts from the text. R Markdown in corporate settings. Views expressed here are personal and not supported by university or company. dev: ('pdf' for LaTeX output and 'png' for HTML/markdown; character) the function name which will be used as a graphical device to record plots; for the convenience of usage, this package has included all the graphics devices in base R as well as those in Cairo, cairoDevice and tikzDevice, e. Ever string that started with a markup sign was a markup start, and every string that ended with a markup sign was a markup end. This cheatsheet is specifically Markdown Here's version of Github-flavored Markdown. Believe it or not, we've only just begun exploring what can be accomplished with Markdown. One thing that Discord doesn't support particularly well, however, is a vibrant and colorful text chat experience. Because they're non-standard, they're not essential to learning the basics, as we've introduced here. TLDR: This tutorial teaches you how to install LaTeX, R and R Markdown on Windows 10. extra_dependencies. The following is markdown text that will be formatted: Can highlight {#bgblack multiple words}. md) document which includes the R code and it's output. to highlight text). … So, let's write a little R Markdown table. > > This is a second paragraph within the blockquoted text. output: tufte::tufte_html: tufte_variant: "envisioned" To see the R Markdown source of this example document, you may follow this link to Github , use the wizard in RStudio IDE ( File -> New File -> R Markdown -> From Template ), or open the Rmd. It can contain chunks of embedded R code. 100% Open Source!. Set text color by using This text will be red. The R Markdown documentation on creating websites has documentation on additional available features and configuration options. Discord uses some elements of Markdown but not all. Although it was originally designed as an easier way to write web pages it can be converted to many other rich text formats. … This information could have been written in bullet points … or in prose, but by using a table, … it's easier for the reader to compare the different methods … and count, for instance, how many methods there are … for creating. Pandoc's Markdown Set render options with YAML When you render, R Markdown 1. Convert HTML to Markdown. the detail construct is plain html, it is not markdown. knitr can be used to convert R Markdown files to many different formats including: html, pdf, GitHub markdown (. md file with knitr 2. You can create a slide show broken up into sections by using the # and ## heading tags (you can also create a new slide without a header using a horizontal rule (---). > > This is a second paragraph within the blockquoted text. Many, many thanks are due to the developers of bootstrap-select for their hard work and excellent documentation. my text here. Precisely speaking, it is Pandoc's Markdown. Possible values inclued l for left, c for center, and r for right. To export a brewed file to other then Pandoc's markdown, please use the convert parameter. It can’t cover every edge case, so if you need more information about any of these elements, refer to our reference guides for basic syntax and extended syntax. 0 or higher. After an introduction to concepts related to reproducible programming and research, demonstrations of standard markdown, as well as overviews of different formats, will be provided, including exercises. It doesn't do anything fancy like change the font size, color, or type — just the essentials, using keyboard symbols you already know. Since the initial description of Markdown contained ambiguities and unanswered questions, the implementations that appeared over the years have subtle differences and many come with syntax extensions. Markdown is a simple way to format text that looks great on any device. Blockquotes¶. A text string you want to append on or replace the. There are a lot of ways to get sophisticated here, and we're only covering a few possibilites here. It has a number of great features: easy syntax for a number of basic objects; code and output are in the same place and so are. There's text chat, but there are no built-in color commands and, at first glance, no way to do anything "fancy" with your text. One thing I was working on was a part of my last post. We see that this is an intercross with `r nind(sug)` individuals. Below is an example of highlighting SAS code within an R Markdown document. Note: Markdown language is an advanced modification that falls out of the scope of Squarespace support. We limit ourselves to base R graphics in this tutorial, therefore we use par(), the function that queries and sets base R graphical parameters. How to change more than one plot option in R. Use basic symbols – #, *, (), [], !, -, ~ – we’ll focus on making it look good on any screen and any device. For more complete info, see John Gruber's original spec and the Github-flavored Markdown info page. Use a productive notebook interface to weave together narrative text and code to produce elegantly formatted output. Markdown is a simple formatting syntax for > authoring web pages (click the **Help** toolbar button for more details on > using R Markdown). R Markdown supports a reproducible workflow for dozens of static and dynamic output formats including HTML, PDF, MS Word, Beamer, HTML5 slides, Tufte-style handouts, books. Example: $\sum_{n=1}^{10} n^2$ is rendered as \(\sum_{n=1}^{10} n^2. Markdown is great because of its support of code blocks. So, let's highlight R Markdown shown here, and we're going to change the color of this text to purple. I tried color gray [markdown| Stuff |] but that changes the color of the background, not of the text. Markdown is great because of its support of code blocks. Including descriptive alt text helps maintain accessibility for every visitor and should always be included with an image. R Markdown provides an unified authoring framework for data science, combining your code, its results, and your prose commentary. We see that this is an intercross with `r nind(sug)` individuals. Markdown is often used to format readme files, for writing messages in online discussion forums, and to create rich text using a plain text editor. Markdown is a simple formatting syntax for > authoring web pages (click the **Help** toolbar button for more details on > using R Markdown). 1 Introduction. Set text color by using This text will be red. rmd', output_format=c('html_document','pdf_document')) I get two files: tmp. Text before page break. We only changed the fonts, background color, and text color based on the default Tufte style. dev: ('pdf' for LaTeX output and 'png' for HTML/markdown; character) the function name which will be used as a graphical device to record plots; for the convenience of usage, this package has included all the graphics devices in base R as well as those in Cairo, cairoDevice and tikzDevice, e. You can choose a different device using the chunk option dev. Hello, so I created an R markdown file as in File -> New File -> R Markdown. Creating documents with R Markdown starts with an. com: The original subreddit, now archived. There are a lot of ways to get sophisticated here, and we're only covering a few possibilites here. , plain text, list items, links, etc. Using Custom CSS in Markdown Mode. There are two different link types in Markdown, but both of them render the exact same way. 0), the following font characteristics may be set:. After the tutorial, you will be able to create R presentations on your own with R Markdown in RStudio. You can use Markdown in the Markdown Block. md files on GitHub can be so incredibly convenient to use, but it always feels like there's something I need that the web interface makes weirdly impossible to do (e. I am a new LaTeX and RMarkdown user. layout: true. Press J to jump to the feed. height=8} plot(sug) ``` Output from knitr: We see that this is an intercross with 163 individuals. Rmd file is fed to knitr, which executes all of the R code chunks and creates a new markdown (. Hello, so I created an R markdown file as in File -> New File -> R Markdown.