4591 search results for "git"

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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Sentiment Analysis on Twitter with Viralheat API

September 2, 2013
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Sentiment Analysis on Twitter with Viralheat API

Hi there! Some time ago I published a post about doing a sentiment analysis on Twitter. I used two wordlists to do so; one with positive and one with negative words. For the first try of a sentiment analysis it is surely a good way to start but if you want to receive more accurate …

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Showing results from Cox Proportional Hazard Models in R with simPH

September 2, 2013
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Showing results from Cox Proportional Hazard Models in R with simPH

Effectively showing estimates and uncertainty from Cox Proportional Hazard (PH) models, especially for interactive and non-linear effects, can be challenging with currently available software. So, researchers often just simply display a results table. These are pretty useless for Cox PH models. It is difficult to decipher a simple linear variable’s estimated effect and basically impossible to understand time...

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Easy 3-Minute Guide to Making apply() Parallel over Distributed Grids and Clusters in R

September 1, 2013
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Easy 3-Minute Guide to Making apply() Parallel over Distributed Grids and Clusters in R

Last week I attended a workshop on how to run highly parallel distributed jobs on the Open Science Grid (osg). There I met Derek Weitzel who has made an excellent contribution to advancing R as a high performance computing language by developing BoscoR. BoscoR greatly facilitates the use of the already existing package “GridR” by The post Easy...

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Latent Variable Analysis with R: Getting Setup with lavaan

September 1, 2013
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Latent Variable Analysis with R: Getting Setup with lavaan

Getting Started with Structural Equation Modeling Part 1Getting Started with Structural Equation Modeling: Part 1 Introduction For the analyst familiar with linear regression fitting structural equation models can at first feel strange. In the R environment, fitting structural equation models involves learning new modeling syntax, new plotting...

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