Bangalore workshop [ಬೆಂಗಳೂರು ಕಾರ್ಯಾಗಾರ]

July 30, 2014
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Bangalore workshop [ಬೆಂಗಳೂರು ಕಾರ್ಯಾಗಾರ]

Second day at the Indo-French Centre for Applied Mathematics and the workshop. Maybe not the most exciting day in terms of talks (as I missed the first two plenary sessions by (a) oversleeping and (b) running across the campus!). However I had a neat talk with another conference participant that led to

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Accidental aRt

July 30, 2014
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Accidental aRt

R is a very powerful language for creating custom data visualizations, but during the development process sometimes you make a mistake and things go horribly wrong. But sometime serendipity...

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drinkR: Estimate your Blood Alcohol Concentration using R and Shiny.

July 30, 2014
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drinkR: Estimate your Blood Alcohol Concentration using R and Shiny.

Inspired by events that took place at UseR 2014 last month I decided to implement an app that estimates one’s blood alcohol concentration (BAC). Today I present to...

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Building Interactive Graphs with ggplot2 and Shiny

July 30, 2014
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Building Interactive Graphs with ggplot2 and Shiny

Some time ago, I was contacted from guys at Packt Publishing. Their just published the Building Interactive Graphs with ggplot2 and Shiny online course and they ask me my (humble) opinion....

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“F-bombs” in GitHub Commits (warning: contains profanity)

July 30, 2014
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“F-bombs” in GitHub Commits (warning: contains profanity)

Warning: this post contains profanity...arguably excessive amounts of it.  If you are a humorless no-fun, you are recommended to proceed no further. Seriously though, the title is quite descriptive...

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Variable Selection in Market Segmentation: Clustering or Biclustering?

July 29, 2014
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Variable Selection in Market Segmentation: Clustering or Biclustering?

Will you have that segmentation with one or two modes?The data matrix for market segmentation comes to us with two modes, the rows are consumers and the columns are...

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Packages vs ProjectTemplate

Packages vs ProjectTemplate tl;dr Imposing a different structure than R packages for distributing R code is a bad idea, especially now that R package tools have gotten to the point where...

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Revisiting package dependencies

July 29, 2014
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Revisiting package dependencies

by Andrie de Vries In my previous post I wrote about how to identify and visualize package dependencies. Within hours, Duncan Murdoch (member of R-core) identified some discrepancies between...

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2 new R jobs (for July 29th 2014)

July 29, 2014
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r_jobs

This is the bimonthly R Jobs post (for 2014-07-29), based on the R-bloggers’ sister website: R-users.com. If you are an employer who is looking to hire people from the R community, please visit this link...

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Fast-track publishing using the new R markdown – a tutorial and a quick look behind the scenes

July 29, 2014
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Fast-track publishing using the new R markdown – a tutorial and a quick look behind the scenes

The new R Markdown (rmarkdown-package) introduced in Rstudio 0.98.978 provides some neat features by combining the awesome knitr-package and the pandoc-system. The system allows for some neat simplifications of...

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Hit and run. Think Bayes!

July 29, 2014
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Hit and run. Think Bayes!

At the R in Insurance conference Arthur Charpentier gave a great keynote talk on Bayesian modelling in R. Bayes' theorem on conditional probabilities is strikingly simple,...

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analyze the fda adverse event reporting system (faers) with r

July 29, 2014
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doctors prescribe medications for patients all the time.  all the time.  sometimes the results are beneficial, other times the drug has no discernible effect, but occasionally those substances actually...

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Creating an analysis as a package and vignette

Creating an analysis as a package and vignette Following from my last post, I am going to go step by step through the process I use to generate an...

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Volatility Histeresis: A First Attempt

July 28, 2014
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Volatility Histeresis: A First Attempt

So the last time that a FRAMA strategy was tried with price crossovers, the problem was that due to counter-trending … Continue reading →

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Chain Operations: An Interesting Feature in dplyr Package

July 28, 2014
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Chain Operations: An Interesting Feature in dplyr Package

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Data Caching

July 28, 2014
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Data caching is not new. It is often necessary to save intermediate data files when the process of loading and/or manipulating data takes a considerable amount of time. This...

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Clipping spatial data in R

July 28, 2014
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Clipping spatial data in R

This miniature vignette shows how to clip spatial data based on different spatial objects in R and a ‘bounding box’. Spatial overlays are common in GIS applications and R...

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Comment on Sustainability and innovation in staple crop production in the US Midwest

July 28, 2014
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Comment on Sustainability and innovation in staple crop production in the US Midwest

After writing a blog post about the paper “Sustainability and innovation in staple crop production in the US Midwest” I decided to submit a formal comment to the International...

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jpmml and R (Free Webinar)

July 28, 2014
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jpmml and R (Free Webinar)

This free, global webinar will provide an introduction to jpmml, the world’s leading open-source PMML scoring engine currently being utilized by companies such as Airbnb to rapidly deploy predictive...

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The Pay-for-Performance Myth

July 28, 2014
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The Pay-for-Performance Myth

Last week, Eric Chemi and Ariana Giorgi published an interesting article on “The Pay-for-Performance Myth” With all the public chatter about exorbitant executive compensation and income inequality, it’s useful to...

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EARL and other upcoming events

July 28, 2014
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EARL and other upcoming events

Highlighted EARL As in “Effective Applications of the R Language”. 2014 September 15-17, London. Somehow they gave higher billing to Ben Goldacre than to Pat Burns.  If Obama were...

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Pie Charts. Are they worth the Fight?

July 28, 2014
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Pie Charts. Are they worth the Fight?

Like Rob, I recently got back from ICOTS. What a great conference. Kudos to everyone who worked hard to organize and pull it off. In one of the sessions...

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Reuters uses R to report on surge in coastal flooding in US

July 28, 2014
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Reuters uses R to report on surge in coastal flooding in US

As global warming causes sea levels to rise, the risk of flooding for coastal settlements also rises over time. A recent analysis by Reuters find that incidents of coastal...

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Analyses as Packages

Analyses as Packages TL;DR Instead of writing an analysis as a single or set of R scripts, use a package and include the analysis as a vignette of the package. Read...

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a:class <- b

July 28, 2014
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Usually in strongly typed languages, like C++, the type of a variable comes before the variable, e.g.: int x = 23 ; So x is declared of...

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Who wants to disrupt R training and R education?

July 28, 2014
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Who wants to disrupt R training and R education?

Using EdTech applications as an academic, R trainer or training company is no longer a unique selling proposition, but a must-have commodity. In this post, we introduce the new DataCamp course creation...

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Cigarette and life expectancy

July 28, 2014
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Cigarette and life expectancy

Yesterday evening, I uploaded a graph, with the labor productivity as a function of coffee consumption. Of course, it was for fun ! With this kind of regression, base...

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Analyzing package dependencies and download logs from Rstudio, and a start towards building an R recommendation engine

July 27, 2014
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Analyzing package dependencies and download logs from Rstudio, and a start towards building an R recommendation engine

In this post, I will focus on the analysis of available R packages and the behavior of its users. In essence, this involves looking at the data in two...

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Coffee and Productivity

July 27, 2014
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Coffee and Productivity

On Twitter, I was asked if there were serious research papers published on coffee consumption and labour productivity. There are some papers on coffee breaks and productivity, e.g. Productivity Through...

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