I’m excited to announce a new R package: rapier, a package that enables you to convert your existing R code into web APIs by merely adding a couple of special comments. Take a look: # myfile.R #' @get /mean normalMean [Read more...]

We’re thrilled to announce the availability of shinyStore, an R package that enables HTML5 Web Storage from Shiny, an interactive web application framework for R. A live demo of an example application is available here. Set a text value then refresh the page, or close the tab and come ... [Read more...]

We’re happy to announce the release of our latest R package, shinyTree. shinyTree is an integration of the jsTree library with the Shiny interactive web framework for R, which makes it simple for R developers to create web applications without knowing anything about HTML or JavaScript. You can view ... [Read more...]

The Ace code editor is an elegant, full-featured, browser-based code editor used in such products as RStudio’s IDE. We’re announcing a new R package called shinyAce (now available on CRAN) which integrates the Ace editor into the Shiny web framework. For those who may be unfamiliar, Shiny is ... [Read more...]

The rgl package has been used to produce rich, interactive 3D graphics within R using the OpenGL framework for some time. The rgl authors also added the ability to export to WebGL, allowing R authors to produce interactive 3D graphics that were accessible from within any modern web browser. This ... [Read more...]

I’m sharing the slides from the talk I’ll be giving at the Dallas R Users Group on creating R packages (and other techniques for reproducing R). I’ll introduce R scripts, reproducible R documents, and R packages. We’ll use the knitr, devtools, and roxygen2 packages in the ... [Read more...]

I’ll be presenting at the Dallas R Users Group next Saturday at 10:00AM at the University of Dallas on how to reproduce your R code. We’ll review how to use R scripts, how to embed R code in reproducible documents, and then introduce how to create your own ... [Read more...]

It’s often beneficial to have a variable shared between all the functions in an R package. One obvious example would be the maintenance of a package-wide cache for all of your functions. I’ve encountered this situation multiple times and always forget at least one important step in the ... [Read more...]

If you’ve encountered errors such as Warning in rgl.init(initValue) : RGL: unable to open X11 display Warning in fun(libname, pkgname) : error in rgl_init or Error: rgl_dev_getcurrent when trying to use a graphically based package like RGL with Shiny Server, then you’re in the ... [Read more...]

GitHub recently launched a more powerful search feature which has been used on more than one occasion to identify sensitive files that may be hosted in a public GitHub repository. When used innocently, there are all sorts of fun things you can find with this search feature. Inspired by Aldo ... [Read more...]

Below you can download the slides presented on February 9, 2013 at the Dallas R Users Group on RStudio’s Shiny framework which allows you to create interactive web applications in R. No knowledge of HTML or JavaScript is required! I introduce the alternatives and history of R programming on the web, ... [Read more...]

Setting up Shiny Server on Amazon’s Elastic Compute Cloud (EC2) can be a bit of a process if you’re unfamiliar with Linux system administration. Thankfully, we’ve done all the hard work for you! If you’re looking to get Shiny Server running in EC2 without delay, just ... [Read more...]

Just a heads-up for any R users in the Dallas/Fort Worth Metroplex: I’ll be presenting at the Dallas R Users Group this Saturday, 2/9/2013 at 10:00AM at the University of Dallas (1845 East Northgate Drive, Irving, TX). I’ll be talking about how to use RStudio’s new Shiny framework ... [Read more...]

You can view the application online at http://trestletechnology.net:3838/rgl/! (Bear with us as we try out the very early release of Shiny Server. There may be some downtime and manual restarts of the service required in the next couple of weeks. Please drop us a line if it’... [Read more...]

Check out the application on Glimmer!  http://glimmer.rstudio.com/qbrc/grn/   We’ve been experimenting with RStudio’s new Shiny software as a way to quickly and easily create interactive, responsive web applications which are able to leverage complicated analytics back-ends built in the R programming language. We created ... [Read more...]

This is a quick follow-up to my previous post about Color Palettes in RGB Space. Achim Zeileis had commented that, perhaps, it would be more informative to evaluate the color palettes in HCL (polar LUV) space, as that spectrum more accurately describes how humans perceive color. Perhaps more clear trends ... [Read more...]

Introduction I've recently been interested in how to communicate information using color. I don't know much about the field of Color Theory, but it's an interesting topic to me. The selection of color palettes, in particular, has been a topic I've been faced with lately. I downloaded 18 different sequential color ... [Read more...]

Matt Chandler vs. Mark Driscoll I came across an interesting API from Viral Heat which is capable of “Sentiment Analysis.” This analysis is designed to capture the sentiment of a statement by ranking it on a scale from -1 to 1. For instance, a chipper sentence like “The smell of roses ... [Read more...]