As I know, there are few choices to connect from R to MS SQL Server: RODBC RJDBC rsqlserver But only second option can be used on mac and linux machines. Here is nice stackoverflow thread. Most of the people suggest to use microsoft sql java driver. But there is a ... [Read more...]

In our previous post in this series, we introduced sessionization, or converting log data into a form that’s suitable for analysis. We looked at basic considerations, like dealing with time, choosing an appropriate dataset for training models, and choosing appropriate (and achievable) business goals. In that previous example, we ... [Read more...]

Matrix factorization follows from the realization that nothing forces us to accept the data as given. We start with objects placed in rows and record observations on those objects arrayed along the top in columns. Neither the objects nor the measuremen... [Read more...]

I got a bit bored (sorry Mike), and wrote this. I didn’t take long (I tell you that not so much to cover my backside as to celebrate the majesty of R). First, I estimated probabilities of a day being … Continue reading → [Read more...]

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A while back I wrote about how the classical non-parametric bootstrap can be seen as a special case of the Bayesian bootstrap. Well, one difference between the two methods is that, while it is straightforward to roll a classical bootstrap in R, there is no easy way to do a ... [Read more...]

The 2015 Big Data Summit 9-10 August 2015 collocated with ACM KDD 2015, Sydney URL: http://2015.bigdatasummit.co/ We take this privilege opportunity to invite you to participate in the 2015 Big Data Summit: • Co-located with ACM KDD2015 • Plenary sessions … Continue reading → [Read more...]

This entry is part 16 of 16 in the series Using R The MazamaSpatialUtils package on CRAN has just been updated with additional shape file conversion scripts and location buffering so that points located just outside of polygons (i.e. coastal …   read more ... [Read more...]

Dear R users, ten days after the conference here you ar [...] [Read more...]

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We were asked a question on how to (in R) aggregate quarterly data from what I believe was a daily time series. This is a pretty common task and there are many ways to do this in R, but we’ll focus on one method using the zoo and dplyr ... [Read more...]

We were asked a question on how to (in R) aggregate quarterly data from what I believe was a daily time series. This is a pretty common task and there are many ways to do this in R, but we’ll focus on one method using the zoo and dplyr ... [Read more...]

by Ari Lamstein, Software Engineer and Data Analyst Creating an email course for my R packages has significantly increased the number of people who use the packages. It has also reduced the learning curve for the packages and brought me into greater contact with my users. In this post I ... [Read more...]

EARL (Effective Applications of the R Language) is a Conference organised by Mango Solutions for users and developers of the open source R programming language. The primary focus of the Conference will be the commercial usage of R across a range … Continue reading → [Read more...]

Over the weekend we released version 0.2.1 of the ChainLadder package for claims reserving on CRAN. New FeaturesNew function PaidIncurredChain by Fabio Concina, based on the 2010 Merz & Wüthrich paper Paid-incurred chain claims reserving methodFunctions plot.MackChainLadder and plot.BootChainLadder gained new argument which, allowing users to specify which sub-plot to ... [Read more...]

Over the weekend we released version 0.2.1 of the ChainLadder package for claims reserving on CRAN. New FeaturesNew function PaidIncurredChain by Fabio Concina, based on the 2010 Merz & Wüthrich paper Paid-incurred chain claims reserving methodFunctions plot.MackChainLadder and plot.BootChainLadder gained new argument which, allowing users to specify which sub-plot to ... [Read more...]

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EMC recently ran a competion to find out why John McGuinness, the legendary motorcycle racer known as the "Morecambe Missile", is outperforms the average motorcycle racer. To answer this question, EMC instrumented his bike and his suit with a number of real-time sensors. (Data collected included gear and RPM for ... [Read more...]

The first time I read John Cook’s advice “Don’t invert that matrix,” I wasn’t sure how to follow it. I was familiar with manipulating matrices analytically (with pencil and paper) for statistical derivations, but not with implementation details in software. … Continue reading → [Read more...]

Version control has become essential for me keeping track of projects, as well as collaborating. It allows backup of scripts and easy collaboration on complex projects. RStudio works really well with Git, an open source open source distributed version control system, and GitHub, a web-based Git repository hosting service. I ... [Read more...]