Blog Archives

Implementing a DPU with OpenCPU

September 11, 2013
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Implementing a DPU with OpenCPU

One of the prime use cases in the design of OpenCPU has been the “Data Processing Unit”, for short: DPU. A DPU is a modular, stateless data I/O unit which is called remotely by other software. In the OpenMHealth architecture a DPU must use JSON for data input and output, and is called over...

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Knitr/Markdown OpenCPU App

August 30, 2013
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A new little OpenCPU app allows you to knit and markdown in the browser. It has a fancy pants code editor which automatically updates the output after 3 seconds of inactivity. It uses the Ace web editor with mode-r.js (thanks to RStudio for making the latter available). Like all OpenCPU apps, the source package lives in the opencpu app...

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Knitr/Markdown OpenCPU App

August 30, 2013
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Knitr/Markdown OpenCPU App

A new little OpenCPU app allows you to knit and markdown in the browser. It has a fancy pants code editor which automatically updates the output after 3 seconds of inactivity. It uses the Ace web editor with mode-r.js (thanks to RStudio for making the latter available). Like all OpenCPU apps, the source...

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OpenCPU 1.0 release!

August 27, 2013
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OpenCPU 1.0 release!

After more than 3 years of development, we release the first official version of the OpenCPU system. Based on feedback and experiences from the beta series, OpenCPU version 1.0 has been rewritten entirely from scratch. The result is simple and flexible API that is easier to understand yet more powerful than before. With the new...

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OpenCPU 1.0 release!

August 26, 2013
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After more than 3 years of development, we release the first official version of the OpenCPU system. Based on feedback and experiences from the beta series, OpenCPU version 1.0 has been rewritten entirely from scratch. The result is simple and flexible API that is easier to understand yet more powerful than before. With the new release also comes a new website and...

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Scaling the R ecosystem: Possible Directions for Improving Dependency Versioning

July 2, 2013
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A paper published today in The R Journal discusses a fundamental limitation affecting reliability and reproducibility of R code. It explains how lack of dependency versioning causes R based applications break down, Sweave documents to stop working and CRAN to hit scaling problems. The paper suggests several solutions inspired by other open-source communities that could ...

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The Foundation for Open Access Statistics

April 23, 2013
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Earlier this month we blogged about Harvard Professors Gary King and Stuart Shieber providing advice to graduate students about open access, dissertations, and journal publishing. We also mentioned some of the great initiatives that facilitate open access publishing in the statistics community, like the Journal of Statistical Software (JSS), The R Journal and arxiv.org. The ...

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UseR! 2013 website at user2013.org

April 16, 2013
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For reasons beyond my understanding, the user 2013 committee didn’t register a domain name for the website, and the official address of the conference is: http://161.67.142.97/congresos/useR-2013/. Not only is this impossible to remember for humans, but it won’t show up in search engines. So I decided to help them out and invest 8 euro to ...

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Tip: Julia vs. R – introduction videos and more

April 14, 2013
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Last years UseR 2012 conference in Nashville had an interesting discussion session titled “What other languages should R users know about?“. General consensus was that multilingualism is inevitable in modern computing, and panel members presented various languages that complement R in different ways. Some of the usual suspects included SQL, python, and of course C++, ...

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Security in R: RAppArmor package & paper updates

April 5, 2013
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This week version 0.8.3 of RAppArmor appeared on CRAN. RAppAmor is a package to dynamically enforce security policies and hardware restrictions in R on Linux systems. It currently supports Ubuntu 12.04+, Debian 7 and OpenSuse 12.1+. The readme page has more info, and helpful video tutorials to get you started. One important change in the ...

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