5117 search results for "git"

Linear regression from a contingency table

September 7, 2013
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Linear regression from a contingency table

This morning, Benoit sent me an email, about an exercise he found in an econometric textbook, about linear regression. Consider the following dataset, Here, variable X denotes the income, and Y the expenses. The goal was to fit a linear regression (actually, in the email, it was mentioned that we should try to fit an heteroscedastic model, but let...

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Fearsome Engines, Part 1

September 7, 2013
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Fearsome Engines, Part 1

Back in June I discovered pqR, Radford Neal’s fork of R designed to improve performance. Then in July, I heard about Tibco’s TERR, a C++ rewrite of the R engine suitable for the enterprise. At this point it dawned on me that R might end up like SQL, with many different implementations of a common

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Mimic Bigger is not Better Post by Scannel & Kurz

September 6, 2013
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The following Github repo has the R code I put together that allows us to follow along and modify the great idea from Scannel & Kurz on app growth and it’s impact on yield. https://github.com/Btibert3/sk-delta-apps-yield/blob/master/README.md Take a look at the repo and feel free to clone it if you want to learn R or add

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Type conversion and you (or and R)

September 5, 2013
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Types and type conversion can be a tricky and intricate topic, and sometimes can lead to some real head-scratcher issues in R. Hence a somewhat confusing title.This is for people still relatively new to R, and I will skip some gory details. Actually I will skip most of them, the canonical source for type and conversion information is the...

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After Three Months I Cannot Reproduce My Own Book

September 5, 2013
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After Three Months I Cannot Reproduce My Own Book

I thought I could easily jump to a high standard (reproducibility), but I failed. Some of you may have noticed that the knitr book is finally out. Amazon is offering a good price at the moment, so if you are interested, you'd better hurry up. I a...

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How to build a single-node Hadoop/R system

September 3, 2013
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The best way to learn any software is to use it, and if you're new to Hadoop and want to try using Hadoop with R the process of setting up your own Hadoop cluster can be daunting (to say the least). But if learning is the goal, the key is that you don't need to install a full cluster....

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Using Google maps API and R

September 3, 2013
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Using Google maps API and R

This post shows how to use Google Maps‘ API with R. Combine the first part with Plyr and it becomes a very powerful tool in just a few lines of code. You can find a gist in RMarkdown with the code here or click below to continue reading. The post Using Google maps API and R appeared first on

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Call for papers: Budapest BI Forum

September 3, 2013
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Call for papers: Budapest BI Forum

I am really happy to share some news with all R users about an upcoming conference to be hold in Budapest, Hungary. The organisers gave birth to the Hungarian Open Source BI Conference and the Innovative BI conference last year, and now building on the...

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Doughnut chart in R with googleVis

September 3, 2013
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The guys at Google continue to update and enhance the Chart Tools API. One new recent feature is a pie chart with a hole, or as some call them: donut charts.Thankfully the new functionality is being achieved through new options for the existing pie cha...

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Fun With Just-In-Time Compiling: Julia, Python, R and pqR

September 2, 2013
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Fun With Just-In-Time Compiling: Julia, Python, R and pqR

Recently I’ve been spending a lot of time trying to learn Julia by doing the problems at Project Euler. What’s great about these problems is that it gets me out of my normal design patterns, since I don’t generally think about prime numbers, factorials and other number theory problems during my normal workday. These problems Fun With Just-In-Time...

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