Blog Archives

Microsoft R Server 9.1 now available

April 19, 2017
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During today's Data Amp online event, Joseph Sirosh announced the new Microsoft R Server 9.1, which is available for customers now. In addition the updated Microsoft R Client, which has the same capabilities for local use, is available free for everyone on both Windows and — new to this update — Linux. This release adds many new capabilities to...

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Warren Buffett Shareholder Letters: Sentiment Analysis in R

April 18, 2017
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Warren Buffett Shareholder Letters: Sentiment Analysis in R

Warren Buffett — known as the "Oracle of Omaha" — is one of the most successful investors of all time. Wherever the winds of the market may blow, he always seems to find a way to deliver impressive returns for his investors and his company, Berkshire Hathaway. Every year he authors his famous "shareholder letter" with his musing about...

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Free AI Workshop, May 9 in Seattle

April 17, 2017
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There will be free AI workshop in Seattle on May 9, presented by members of the Microsoft Data Science team. The AI Immersion Workshop includes five specializations to choose from (in parallel tracks), all focused on an aspect of developing and deploying intelligent applications: Applied Machine Learning for Developers, featuring Microsoft R Server and Azure Machine Learning Big AI...

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Data Amp: a major on-line Microsoft event, April 19

April 12, 2017
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Data Amp: a major on-line Microsoft event, April 19

This coming Wednesday, April 19 at 8AM Pacific Time (click for your local time), Microsoft will be hosting a major on-line event of interest to anyone working with big data, analytics, and artificial intelligence: Microsoft Data Amp. During Data Amp, Executive Vice President Scott Guthrie and Corporate Vice President Joseph Sirosh will share how Microsoft’s latest innovations put data,...

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Prepare real-world data for analysis with the vtreat package

April 11, 2017
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Prepare real-world data for analysis with the vtreat package

As anyone who's tried to analyze real-world data knows, there are any number of problems that may be lurking in the data that can prevent you from being able to fit a useful predictive model: Categorical variables can include infrequently-used levels, which will cause problems if sampling leaves them unrepresented in the training set. Numerical variables can be in...

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In case you missed it: March 2017 roundup

April 10, 2017
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In case you missed them, here are some articles from March of particular interest to R users. A tutorial and comparison of the SparkR, sparklyr, rsparkling, and RevoScaleR packages for using R with Spark. An analysis of Scrabble games between AI players. The doAzureParallel package, a backend to "foreach" for parallel computations on Azure-based clusters. The UK government project...

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The faces of R, analyzed with R

April 7, 2017
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The faces of R, analyzed with R

Maëlle Salmon recently created a collage of profile pictures of people who use the #rstats hashtag in their Twitter bio to indicate their use of R. (I've included a detail below; click to see the complete version at Maëlle's blog.) Naturally, Maëlle created the collage using R itself. Matching Twitter bios were found using the search_users function in the...

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Microsoft R Open 3.3.3 now available

April 6, 2017
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Microsoft R Open (MRO), Microsoft's enhanced distribution of open source R, has been upgraded to version 3.3.3, and is now available for download for Windows, Mac, and Linux. This update upgrades the R language engine to R 3.3.3, upgrades the installer, and updates the bundled packages. R 3.3.3 makes just a few minor fixes compared to R 3.3.2 (see...

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Fitting a rational function in R using ordinary least-squares regression

April 6, 2017
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Fitting a rational function in R using ordinary least-squares regression

by Srini Kumar, VP of Product Management and Data Science, LevaData; and Bob Horton, Senior Data Scientist, Microsoft A rational function is defined as the ratio of two functions. The (https://en.wikipedia.org/wiki/Pad%C3%A9_approximant) uses a ratio of polynomials to approximate functions: $$ R(x)= \frac{\sum_{j=0}^m a_j x^j}{1+\sum_{k=1}^n b_k x^k}=\frac{a_0+a_1x+a_2x^2+\cdots+a_mx^m}{1+b_1 x+b_2x^2+\cdots+b_nx^n} $$ Here we show a way to fit this type of...

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Publish R functions as stored procedures with the sqlrutils package

April 4, 2017
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If you've created an R function (say, a routine to clean up missing values in a data set, or a function to make forecasts using a machine learning model), and you want to make it easy for DBAs to use it, it's now possible to publish R functions as a SQL Server 2016 stored procedure. The sqlrutils package provides...

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