1660 search results for "tutorial"

In case you missed it: January 2015 roundup

February 9, 2015
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In case you missed them, here are some articles from January of particular interest to R users. Slides on reproducible data analysis with Revolution R Open and the checkpoint package. A review of a recent Bay Area R User Group meetup, featuring Hadley Wickham, Ryan Hafen and Nick Elprin. In an article at opensource.com, I explain why now is...

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Quickcheck: Randomized unit testing for R

February 4, 2015
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Hadley Wickham's testthat package has been a boon for R package authors, making it easy to write tests to verify that your code is working directly, and alerting you when you make changes to your code that inadvertently breaks things. For the RHadoop project, though, developer Antonio Piccolboni needed a different testing framework, that included the possibility of writing...

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How to Get the Frequency Table of a Categorical Variable as a Data Frame in R

How to Get the Frequency Table of a Categorical Variable as a Data Frame in R

Introduction One feature that I like about R is the ability to access and manipulate the outputs of many functions.  For example, you can extract the kernel density estimates from density() and scale them to ensure that the resulting density integrates to 1 over its support set. I recently needed to get a frequency table of

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A few things I learned about shiny (and reactive programming)

February 2, 2015
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A few things I learned about shiny (and reactive programming)

Reactive dependencies are dynamic Reactives: order of execution Use of isolate to prevent accidental dependencies Conditional panel reactiveValues One of the things I really like about shiny is that it has excellent documentation: the tutorial, articles and gallery go a long way in helping newcomers as well as intermediate programmers mastering the structure and features … Continue reading...

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Should you teach Python or R for data science?

February 2, 2015
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Last week, I published a post titled Lessons learned from teaching an 11-week data science course, detailing my experiences and recommendations from teaching General Assembly's 66-hour introductory data science course. In the comments, I received the ...

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The leaflet package for online mapping in R

January 31, 2015
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The leaflet package for online mapping in R

It has been possible for some years to launch a web map from within R. A number of packages for doing this are available, including: RgoogleMaps, an interface to the Google Maps api leafletR, an early package for creating Leaflet maps with R rCharts, which can be used as a basis for webmaps In this tutorial we use...

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Carl Boettiger on accessing online data with ROpenSci

January 30, 2015
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*Today, Carl Boettiger gave a tutorial on the ROpenSci project and how to use their many packages to connect to online data repositories to retrieve and up deposit data. Here’s our screencast of the talk. All the code from this talk is available at this github repository, and you can download it as a *.zip...

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An R User Group Mini Conference

January 29, 2015
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by Joseph Rickert With a membership that spans the entire Bay Area and the ability to hold meetings from San Jose to San Francisco, the Bay Area useR Group is in the very fortunate position of being able to attract world-class R speakers on a regular basis. Meetings that feature multiple speakers often attract 80 to a 100 or...

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Now’s a great time to learn R. Here’s how.

January 28, 2015
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In a recent article at opensource.com, I offer up some reasons why now is the time to learn R: data scientists are in high demand, R is the natural language for data scientists, and companies around the world are using R (and hiring R programmers) to make sense of new data sources. Sharp Sight Labs also offers some excellent...

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Bringing a Revolution to Microsoft

January 28, 2015
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By Mark Sellors – Senior IT Consultant, UK. In a move that further validates the entire R community, our good friends and colleagues at Revolution Analytics announced their acquisition by Microsoft on Friday. In the short term, Revolution are expecting … Continue reading →

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