As part of a larger effort to clean up and rewrite the opencpu package, some of the more general utilities will be moved into a new, separate package called webutils. The first release of webutils is now on CRAN. The package contains a simple ...

The jsonlite package implements a robust, high performance JSON parser and generator for R, optimized for statistical data and the web. This week version 0.9.13 appeared on CRAN which is the third release in a relatively short period focusing on performance optimization. Fast number formatting Version 0.9.11 and 0.9.12 had already introduced majors ...

I started working on a new R package with bindings for OpenSSL. The initial release is now available from CRAN. To install the package on Linux you need libssl-dev (Debian/Ubuntu) or openssl-devel (Fedora, RHEL, CentOS). For Mac and Windows, pr...

The jsonlite package implements a robust, high performance JSON parser and generator for R, optimized for statistical data and the web. This week version 0.9.12 appeared on CRAN which includes a completely rewritten json parser and more optimized C code for json generation. The new parser is based on yajl which ...

The jsonlite package is a JSON parser/generator optimized for the web. It implements a bidirectional mapping between JSON data and the most important R data types, which allows for converting objects to JSON and back without manual data restructuring. This is ideal for interacting with web APIs, or to ...

The OpenCPU system exposes an HTTP API for embedded scientific computing with R. This provides reliable and scalable foundations for integrating R based analysis and visualization modules into pipelines, web applications or big data infrastruct...

The jsonlite package is a JSON parser/generator optimized for the web. It implements a bidirectional mapping between JSON data and the most important R data types. This is very powerful for interacting with web APIs, or to build pipelines where...

Starting version 1.4.4, the OpenCPU cloud server can run on Redhat distributions, i.e. Fedora and Enterprise Linux (CentOS/RHEL). This post explains how to install and use OpenCPU on these systems. But before continuing I should emphasize that ...

The jsonlite package is a JSON parser/generator for R which is optimized for pipelines and web APIs. It is used by the OpenCPU system and many other packages to get data in and out of R using the JSON format. A bidirectional mapping One of the main strenghts of ...

A recording of the useR! 2014 prentation about OpenCPU is now available on Youtube. This talk gives a brief (20 minute) motivation and introduction to some of the high level concepts of the OpenCPU system. The video contains mostly screen recor...

The schedule and abstracts for useR! 2014 have been posted on the conference website. Session 2 (tuesday 1pm) of the Kaleidoscope track will feature a fantastic set of talks about R and the web, including RCloud (Gordon Woodhull, AT&T), Ope...

TLDR/abstract: See the tvscore demo app or this jsfiddle for all of this in action. This post explains how to use the OpenCPU system to setup a scoring engine for calculating real time predictions. In our example we use the predict.gam function from the mgcv package to make ...

This week a new paper appeared on arXiv titled: The OpenCPU System: Towards a Universal Interface for Scientific Computing through Separation of Concerns. It is based on a chapter of my thesis and provides a conceptual introduction to embedded...

The guys from roqua.nl are working on a OpenCPU wrapper Gem. This simple API client provides a pretty nice basis for building R web applications with Ruby. A minimal example from the readme:

<span>client</span><span>.</span><span>execute</span> <span>:digest</span><span>,</span> <span>:hmac</span><span>,</span> <span>{</span> <span>key</span><span>:</span> <span>'foo'</span><span>,</span> <span>object</span><span>:</span> <span>'bar'</span><span>,</span> <span>algo</span><span>:</span> <span>'md5'</span> <span>}</span>
<span># => ['0c7a250281315ab863549f66cd8a3a53']</span>

Which performs the following JSON RPC request:

digest<span>::</span>hmac<span>(</span>key<span>=</span><span>"foo"</span><span>,</span> object<span>=</span><span>"bar"</span><span>,</span> algo<span>=</span><span>"md5"</span><span>)</span>

They are accepting pull requests!

After a few months of testing we present OpenCPU versions 1.3 and 1.4. These releases do not introduce any major changes in the OpenCPU HTTP API but focus entirely on performance, reliability and security to support long running servers. The on...

The OpenCPU public demo server and ocpu.io have been upgraded to an early version of the upcoming OpenCPU 1.3 release. This release is scheduled for April 17 along with Ubuntu 14.04 (Trusty). By deploying it on the public demo server we get som...

A new version of OpenCPU was released to CRAN and Launchpad. Besides some minor bugfixes, the single-user has better support for configuration. By default, the single-user server will now load configuration from the following file:

path.expand<span>(</span><span>"~/.opencpu.conf"</span><span>)</span>

If this file does not exist, the default configuration is used. Future plans This ...

A new version of the jsonlite package was released to CRAN. In addition to adding small new features, this release cleans up code and documentation. Some annoying compiler warnings inherited from RJSONIO are fixed and the reference manual is a bit more concise. Also some new examples of public JSON ...

Suppose you would like to publish some data, for example to accompany a journal article. One way would be to put a CSV file on your website, and share the URL with your colleagues. However CSV has many limitations: it only works for tabular structures, has limited type safety (pretty ...