R Markdown To Html



Hello I make a r markdown file, it just have only markdown text. And I click the ‘knit document’, R Markdown console says just ‘Execution halted’(Only This.!!!) How can I fix this error? My OS is mac osx catalina and I installed packages knitr, rmarkdown and markdown P.S ) I tried this command but it make.md file but do not make.html file. Install.packages(‘knitr’) install. Create an RMarkdown file. To create a new RMarkdown file (.Rmd), select File - New File - R Markdown. in RStudio, then choose the file type you want to create.For now we will focus on a.html Document, which can be easily converted to other file types later. The newly created.Rmd file comes with basic instructions, but we want to create our own RMarkdown script, so go ahead. By default R Markdown produces standalone HTML files with no external dependencies, using data: URIs to incorporate the contents of linked scripts, stylesheets, images, and videos. This means you can share or publish the file just like you share Office documents or PDFs.

This guide used RStudio IDE Version 1.3.959.

This guide walks you through creating a new R Markdown document and then publishing your document to RStudio Connect.

Prerequisites#

Before you begin, you must:

  • Install R
  • Install the RStudio Integrated Development Environment (IDE)
  • Have the public URL of the RStudio Connect server
  • Have a valid RStudio Connect account that has been promoted to at least the Publisher role
  • Connect your RStudio Account

For more information about requesting permission to publish your content,please see thePublishingsection of the User Guide.

Note

As you walk through this guide, there may be additional steps that are required due to your unique environment. For example, you may need toinstall orupdate packages, restart R, etc. In many cases, RStudio prompts you tocomplete the action that is required to continue with this guide. If you getstuck, please refer to the RelatedDocumentationsection or the RStudio Connect Admin Guide.

Step 1. Create a new R Markdown Document#

RStudio IDE has a sample R Markdown document that is available out of the box. For thisguide, we are going to utilize the sample HTML R Markdown document because everyone hasaccess to it, and it allows us to focus on the task of publishing an R Markdowndocument to RStudio Connect instead of manually creating the document fromscratch. Let'sbegin!

  • Open the RStudio IDE.
  • From the menu bar, select File > New File > R Markdown....

The New R Markdown window displays.

  • Do the following:
  1. Give your document a title.
  2. Optional - Give your document an author.
  3. Since we are creating an R Markdown document using HTML as the output format, no action is required.
  4. Click OK.


The new R Markdown document displays in the editor.

Note

For this How To, we are creating an R Markdown document using the OutputFormat option, 'HTML'. However, there are other default options:

  • PDF
  • Word

Now, we need to Knit the file which generates the document that includes thecontent as well as the output of any embedded R code chunks included in thedocument. Essentially, this step ensures that your document was successfullycreated and works as intended.

  • At the top of the editor, click Knit.

The Save File window displays.

  • In the File name field, type a name for the document.

    Info

    The Save File window that displays may vary based on your OS orversion of RStudio IDE.

  • Optionally, you can create a new folder or select an existing folder.

  • Click Save.

If the Knit was successful, then your document automatically opens in a new browser tab. If it doesn't automatically display, your app may have been blocked as a popup in your browser.

Step 2. Publish your R Markdown document to RStudio Connect#

Note

Before you execute this step, verify that you have connected your RStudioAccount. The procedures are available here.

  • At the top of the editor, click Publish.

  • In the Publish to Server window, confirm that your account is shown in the Publish To Account section and click Publish.

    User Tips

    • You can monitor the status of the deployment in the RStudio IDE Deploy pane.
    • If for any reason you would like to stop the deployment, you can simply click the Stop button located in the Deploy pane.
    • Your newly deployed R Markdown document automatically opens in a new browser tab if the Launch browser check box is selected (it is selected by default).
    • If it doesn't automatically display, your app may have been blocked as a popup in your browser.

Step 3. View your R Markdown Document on RStudio Connect#

  • Navigate back to the RStudio Connect server that you published your content to.
  • If applicable, log back into RStudio Connect.
  • To view the Content that you own, click the Show Options panel button.

  • In the Owners section, select Yours. Your R Markdown document should display in the Content section.

  • To view your R Markdown document, simply click the title of your app.

    Your R Markdown displays in the RStudio Connect browser window.

Related Documentation#

We will author an R Markdown document and render it to HTML. We discuss how to keep the intermediate Markdown file, the figures, and what to commit to Git and push to GitHub. If GitHub is the primary venue, we render directly to GitHub-flavored markdown and never create HTML.

Here is the official R Markdown documentation: http://rmarkdown.rstudio.com

18.1 Hello World

Convert r markdown to html

We’ll practice with RStudio’s boilerplate R Markdown document.

Launch RStudio in a Project that is a Git repo that is connected to a GitHub repo.

We are modelling “walk before you run” here. It is best to increase complexity in small increments. We test our system’s ability to render the “hello world” of R Markdown documents before we muddy the waters with our own, probably buggy, documents.

Do this: File > New File > R Markdown …

  • Give it an informative title. This will appear in the document but does not necessarily have anything to do with the file’s name. But the title and filename should be related! Why confuse yourself? The title is for human eyeballs, so it can contain spaces and punctuation. The filename is for humans and computers, so it should have similar words in it but no spaces and no punctuation.
  • Accept the default Author or edit if you wish.
  • Accept the default output format of HTML.
  • Click OK.

Save this document to a reasonable filename and location. The filename should end in .Rmd or .rmd. Save in the top-level of this RStudio project and Git repository, that is also current working directory. Trust me on this and do this for a while.

You might want to commit here. So you can see what’s about to change …

Click on “Knit HTML” or do File > Knit Document. RStudio should display a preview of the resulting HTML. Also look at the file browser. You should see the R Markdown document, i.e. foo.Rmd AND the resulting HTML foo.html.

Congratulations, you’ve just made your first reproducible report with R Markdown.

You might want to commit here.

18.2 Push to GitHub

Push the current state to GitHub.

Go visit it in the browser.

Do you see the new files? An R Markdown document and the associated HTML? Visit both in the browser. Verify this:

  • Rmd is quite readable. But the output is obviously not there.
  • HTML is ugly.

18.3 Output format

Do you really want HTML? Do you only want HTML? If so, you can skip this step!

The magical process that turns your R Markdown to HTML is like so: foo.Rmd --> foo.md --> foo.html. Note the intermediate markdown, foo.md. By default RStudio discards this, but you might want to hold on to that markdown.

Why? GitHub gives very special treatment to markdown files. They are rendered in an almost HTML-like way. This is great because it preserves all the charms of plain text but gives you a pseudo-webpage for free when you visit the file in the browser. In contrast, HTML is rendered as plain text on GitHub and you’ll have to take special measures to see it the way you want.

In many cases, you only want the markdown. In that case, we switch the output format to github_document. This means render will be foo.Rmd --> foo.md, where foo.md is GitHub-flavored markdown. If you still want the HTML but also the intermediate markdown, there’s a way to request that too.

Output format is one of the many things we can control in the YAML frontmatter – the text at the top of your file between leading and trailing lines of ---.

R Markdown Html To Word

You can make some changes via the RStudio IDE: click on the “gear” in the top bar of the source editor, near the “Knit HTML” button. Select “Output options” and go to the Advanced tab and check “Keep markdown source file.” Your YAML should now look more like this:

You should have gained the line keep_md: true. You can also simply edit the file yourself to achieve this.

In fact this hand-edit is necessary if you want to keep only markdown and get GitHub-flavored markdown. In that case, make your YAML look like this:

Save!

You might want to commit here.

Render via “Knit HTML” button.

Now revisit the file browser. In addition to foo.Rmd, you should now see foo.md. If there are R chunks that make figures, the usage of markdown output formats will also cause those figure files to be left behind in a sensibly named sub-directory, foo_files.

If you commit and push foo.md and everything inside foo_files, then anyone with permission to view your GitHub repo can see a decent-looking version of your report.

If your output format is html_document, you should still see foo.html. If your output format is github_document and you see foo.html, that’s leftover from earlier experiments. Delete that. It will only confuse you later.

You might want to commit here.

18.4 Push to GitHub

Push the current state to GitHub.

Go visit it in the browser.

Do you see the modifications and new file(s)? Your Rmd should be modified (the YAML frontmatter changed). And you should have gained at least, the associated markdown file.

Html
  • Visit the markdown file and compare to our previous HTML.
  • Do you see how the markdown is much more useful on GitHub? Internalize that.

18.5 Put your stamp on it

Select everything but the YAML frontmatter and … delete it!

Write a single English sentence.

Insert an empty R chunk, via the “Chunk” menu in upper right of source editor or with corresponding keyboard shortcut.

Insert 1 to 3 lines of functioning code that begin the task at hand. “Walk through” and run those lines using the “Run” button or the corresponding keyboard shortcut. You MUST make sure your code actually works!

Satisfied? Save!

You might want to commit here.

Now render the whole document via “Knit HTML.” Voilà!

You might want to commit here.

18.6 Develop your report

In this incremental manner, develop your report. Add code to this chunk. Refine it. Add new chunks. Go crazy! But keep running the code “manually” to make sure it works.

If it doesn’t work with you babysitting it, I can guarantee you it will fail, in a more spectacular and cryptic way, when run at arms-length via “Knit HTML” or rmarkdown::render().

Clean out your workspace and restart R and re-run everything periodically, if things get weird. There are lots of chunk menu items and keyboard shortcuts to accelerate this workflow. Render the whole document often to catch errors when they’re easy to pinpoint and fix. Save often and commit every time you reach a point that you’d like as a “fall back” position.

You’ll develop your own mojo soon, but this should give you your first successful R Markdown experience.

18.7 Publish your report

If you’ve been making HTML, you can put that up on the web somewhere, email to your collaborator, whatever.

No matter what, technically you can publish this report merely by pushing a rendered version to GitHub. However, certain practices make this effort at publishing more satisfying for your audience.

Here are two behaviors I find very frustrating:

  • “Here is my code. Behold.” This is when someone only pushes their source, i.e. R Markdown or R code AND they want other people to look at their “product”. The implicit assumption is that target audience will download code and run it. Sometimes the potential payoff simply does not justify this effort.
  • “Here is my HTML. Behold.” This is when someone doesn’t bother to edit the default output format and accepts HTML only. What am I supposed to do with HTML on GitHub?

Creating, committing, and pushing markdown is a very functional, lighweight publishing strategy. Use output: github_document or keep_md: true if output is html_document. In both cases, it is critical to also commit and push everything inside foo_files. Now people can visit and consume your work like any other webpage.

This is (sort of) another example of keeping things machine- and human-readable, which is bliss. By making foo.Rmd available, others can see and run your actual code. By sharing foo.md and/or foo.html, others can casually browse your end product and decide if they even want to bother.

18.8 HTML on GitHub

HTML files, such as foo.html, are not immediately useful on GitHub (though your local versions are easily viewable). Visit one and you’ll see the raw HTML. Yuck. But there are ways to get a preview: such as http://htmlpreview.github.io. Expect much pain with HTML files inside private repos (hence the recommendations above to emphasize markdown). When it becomes vital for the whole world to see proper HTML in its full glory, it’s time to use a more sophisticated web publishing strategy.

I have more general ideas about how to make a GitHub repo function as a website.

18.9 Troubleshooting

Make sure RStudio and the rmarkdown package (and its dependencies) are up-to-date. In case of catastrophic failure to render the boilerplate R Markdown document, consider that your software may be too old. Details on the system used to render this document and how to check your setup:

  • rmarkdown version 2.7. Use packageVersion('rmarkdown') to check yours.
  • R version 4.0.5 (2021-03-31). Use R.version.string to check yours.
  • RStudio IDE 1.2.1555. Use RStudio > About RStudio or RStudio.Version()$version to check yours.

Get rid of your .Rprofile, at least temporarily. I have found that a “mature” .Rprofile that has accumulated haphazardly over the years can cause trouble. Specifically, if you’ve got anything in there relating to knitr, markdown, rmarkdown and RStudio itself, it may be preventing the installation or usage of the most recent goodies. Comment the whole file out or rename it something else and relaunch or even re-install RStudio.

“I have ignored your advice and dumped a bunch of code in at once. Now my Rmd does not render.” If you can’t figure out what’s wrong by reading the error messages, pick one:

  • Back out of these changes, get back to a functional state (possibly with no code), and restore them gradually. Run your code interactively to make sure it works. Render the entire document frequently. Commit after each successful addition! When you re-introduce the broken code, now it will be part of a small change and the root problem will be much easier to pinpoint and fix.
  • Tell knitr to soldier on, even in the presence of errors. Some problems are easier to diagnose if you can execute specific R statements during rendering and leave more evidence behind for forensic examination.
    • Insert this chunk near the top of your .Rmd document:
    • If it’s undesirable to globally accept errors, you can still do this for a specific chunk like so:
  • Adapt the “git bisect” strategy:
    • Put knitr::knit_exit() somewhere early in your .Rmd document, either in inline R code or in a chunk. Keep moving it earlier until things work. Now move it down in the document. Eventually you’ll be able to narrow down the location of your broken code well enough to find the line(s) and fix it.

R Markdown Knit To Html

Check your working directory. It’s going to break your heart as you learn how often your mistakes are really mundane and basic. Ask me how I know. When things go wrong consider:

  • What is the working directory?
  • Is that file I want to read/write actually where I think it is?

Drop these commands into R chunks to check the above:

R Markdown Html Themes

  • getwd() will display working directory at run time. If you monkeyed around with working directory with, e.g., the mouse, maybe it’s set to one place for your interactive development and another when “Knit HTML” takes over?
  • list.files() will list the files in working directory. Is the file you want even there?

Don’t try to change working directory within an R Markdown document. Just don’t. See knitr FAQ #5. That is all.

Don’t be in a hurry to create a complicated sub-directory structure. RStudio/knitr/rmarkdown (which bring you the “Knit HTML” button) are rather opinionated about the working directory being set to the .Rmd file’s location and about all files living together in one big happy directory. This can all be worked around. For example, I recommend the here package for building file paths, once you require sub-directories. But don’t do this until you really need it.