Shiny+Exams

February 10, 2017
By

[This article was first published on R and Finance, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.

Serving book exercises in the web with Shiny and Exams –

As you may know, I recently published a R book in amazon.
I decided to keep R exercises out of the book and serve them freely over the web. This was not a difficult decision since I’m still writing and revising all questions. My experience tell me that good exercises requires time to develop and I didn’t want to rush it just for the sake of publishing the book.

I’m a big fan of package Exams and, given that I already have some questions about R in this format, I should use it to build the exercises for my book. The reader is better served than using a single version format as he/she can rebuild a different set of exercises each time, and take the same set of exercises over and over, if needed. The problem is that building a new exam in package Exams requires R and latex compilation. I could compile in my computer and provide pdf files of different versions in the website, but this is not really an elegant solution.

With that in mind, I was able to write a shiny app that distributes pdf files in the internet. I customized all templates so that they fit my needs. I have never seen anything like that, which is why I am posting it here. I’m still amazed of how much a few lines of code in Shiny can do.

The users can choose the chapter and the language. After clicking the “build” button, a custom call to exams2pdf is made and the user can download a zip file with the contents of the exercises.

Give it a try here.

Curious about the code? All files are available in github.

To leave a comment for the author, please follow the link and comment on their blog: R and Finance.

R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.



If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...

Comments are closed.

Search R-bloggers

Sponsors

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)