by John Mount Ph. D. Data Scientist at Win-Vector LLC Win-Vector's last article on A/B testing described the scope of the realistic circumstances of A/B testing in practice and gave links to different standard solutions. In this article we will be take an idealized specific situation allowing us ... [Read more...]

Bob Carpenter, Daniel Lee, and I are giving a 3-day short course in two weeks. Before class everyone should install R, RStudio and RStan on their computers. If problems occur please join the stan-users group and post any questions. It’s important that all participants get Stan running and bring ... [Read more...]

There are many R time series tutorials floating around on the web this post is not designed to be one of them. Instead I want to introduce a list of the most useful tricks I came across when dealing with financial time series in R. Some of the functions presented ... [Read more...]

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A couple weeks ago I was given the opportunity to teach a 1 hr 30 min slot of an introduction to R course. In the past, I've taught lectures for similar courses, and I ended up asking myself what would be the best short topic to teach and how to teach ... [Read more...]

The multiple regression equation represents the linear combination of the predictors with the smallest mean-squared error. That linear combination is a factorization of the predictors with the factors equal to the regression weights. You may see the wo... [Read more...]

In case you missed the news last week, the [R Consortium was announced](https://www.r-consortium.org/news/announcement/2015/06/linux-foundation-announces-r-consortium-support-millions-users-around). This new non-profit trade group will work with the R Foundation to support the R Community and the R Project generally. As you might expect, the announcement generated quite a ... [Read more...]

hygge A Danish word (pronounced HU-guh) meaning social coziness. I.e. the feeling of a good social atmosphere. – Urban Dictionary Yes, there was plenty of hygge to go around this year’s UseR! that took place last week in Aalborg, Denmark. Everybody I’ve spoken with agrees that it was ... [Read more...]

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Our last article on A/B testing described the scope of the realistic circumstances of A/B testing in practice and gave links to different standard solutions. In this article we will be take an idealized specific situation allowing us to show a particularly beautiful solution to one very special ... [Read more...]

We are delighted to announce that the keynote speakers for EARL 2015 in Boston which takes place on 2nd-4th November will be David Smith, Garrett Grolemund, John Thompson and Richard Pugh David Smith is the R Community Lead at Revolution … Continue reading → [Read more...]

by Aimee Gott It probably hasn’t escaped your notice that last week Aalborg, Denmark played host to the annual UseR conference.  This is an annual R conference bringing together users and developers from academia and industry. With a record 650 attendees, … Continue reading → [Read more...]

Lately, we've been spending a lot of time "stress-testing" our method for the computation of the Expected Value of Partial Perfect Information (EVPPI $-$ I know: the terminology is a bit strange and possibly not-very helpful, as "perfect" information d... [Read more...]

I’ve been slowly prodding the metricsgraphics package towards a 1.0.0 release, but there are some rough edges that still need sorting out. One of them is the ability to handle passing in variables for the x & y accessor values (you can pass in bare and quoted strings). This can now ... [Read more...]

With the creation of the R consortium R has moved up a rung on the ladder of commercial importance. R has captured the early adopters and has picked up a fair few of the early majority (I’m following the technology adoption life-cycle model made popular by the book Crossing ... [Read more...]

This is the fastest 6 weeks that I have ever experienced but the most productive in the development of my project GEO-AWS: Gene Expression Omnibus Analysis for the R Project for Statistical Computing. I have been exposed to some really great tidbits of lessons in open-source software development that I either ... [Read more...]

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There is a time for some things, and a time for all things; a time for great things, and a time for small things — Miguel de Cervantes Building R packages from sources may take a long time, especially if…Read more › [Read more...]

Berlin Institute for Medical Systems Biology is organizing a computational genomics course and R programming will be used for most practical sessions. The course will cover basic statistics, programming and basic concepts in next-generation sequencing ... [Read more...]