July 2015

Hockey Elbow and Other Response Time Injuries

July 29, 2015 | 0 Comments

You've heard of tennis elbow. Well, there's a non-sports, performance injury that I like to call hockey elbow. An example of such an "injury" is shown in Figure 1, which appeared in a recent computer performance analysis presentation. It's a reminder of how easy it is to become complacent when doing ... [Read more...]

Hockey Elbow and Other Response Time Injuries

July 29, 2015 | 0 Comments

You've heard of tennis elbow. Well, there's a non-sports, performance injury that I like to call hockey elbow. An example of such an "injury" is shown in Figure 1, which appeared in a recent computer performance analysis presentation. It's a reminder of how easy it is to become complacent when doing ... [Read more...]

The most popular programming languages on StackOverflow

July 29, 2015 | 0 Comments

by Andrie de Vries Last week, IEEE Spectrum said R rised to #6 in Top Programming languages. They use a weighted methodology of 12 factors to compute their score. Among these factors is the activity on social programming websites, including StackOverflow and Github. I recently used data.stackexchange.com to query the ... [Read more...]

Introducing the nominatim geocoding package

July 29, 2015 | 0 Comments

In the never-ending battle for truth, justice and publishing more R packages than Oliver, I whipped out an R package for the OpenStreetMap Nominatim API. It actually hits the MapQuest Nominatim Servers for most of the calls, but the functionality is the same. The R package lets you: address_lookup: ...
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Computing AIC on a Validation Sample

July 29, 2015 | 0 Comments

This afternoon, we’ve seen in the training on data science that it was possible to use AIC criteria for model selection. __ library(splines) __ AIC(glm(dist ~ speed, data=train_cars, family=poisson(link="log"))) [1] 438.6314 __ AIC(glm(dist ~ speed, data=train_cars, family=poisson(link="identity"))) [1] 436.3997 __ AIC(glm(dist ~ bs(...
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A Dashboard Implementation Of Clustering App

July 28, 2015 | 0 Comments

Background I previously built an interactive, online App using Shiny where you can upload your own data, perform basic clustering analysis, and view correlations in a heatmap. I wrote about this in my last post. While this worked, it was very ugly an... [Read more...]

A Dashboard Implementation Of Clustering App

July 28, 2015 | 0 Comments

Background I previously built an interactive, online App using Shiny where you can upload your own data, perform basic clustering analysis, and view correlations in a heatmap. I wrote about this in my last post. While this worked, it was very ugly and needed a face lift. With the help ... [Read more...]

Mongolite 0.5: authentication and iterators

July 28, 2015 | 0 Comments

A new version of the mongolite package has appeared on CRAN. Mongolite builds on jsonlite to provide a simple, high-performance MongoDB client for R, which makes storing small or large data in a database as easy as converting it to/from JSON. Have a look at the vignette or useR2015 ...
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I loved this %>% crosstable

July 28, 2015 | 0 Comments

This is a public tank you for @heatherturner's contribution. Now the SciencesPo's crosstable can work in a chain (%__%) fashion; useful for using along with other packages that have integrated the magrittr operator. __ candidatos %__% + filter(desc_cargo == 'DEPUTADO ESTADUAL'| desc_cargo =='DEPUTADO DISTRITAL' | desc_cargo =='DEPUTADO FEDERAL' | desc_cargo =='VEREADOR' | desc_... [Read more...]

Pluto: To Catch an Icy King

July 28, 2015 | 0 Comments

Sly as a fox, it is. Mysterious and diminutive, it has eluded us for decades. Despite what we've learned about Pluto, constant debate continues to rage over its classification. From the moment it was discovered, astronomers have bickered over this icy ...
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Goals for the New R Consortium

July 28, 2015 | 0 Comments

by Bob Muenchen The recently-created R Consortium consists of companies that are deeply involved in R such as RStudio, Microsoft/Revolution Analytics, Tibco, and others. The Consortium’s goals include advancing R’s worldwide promotion and support, encouraging user adoption, and improving documentation … Continue reading →
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R tutorial on the Apply family of functions

July 28, 2015 | 0 Comments

Introduction In our previous tutorial Loops in R: Usage and Alternatives , we discussed one of the most important constructs in programming: the loop.  Eventually we deprecated the usage of loops in R in favor of vectorized functions. In this post we highlight some of the most used vectorized functions: the ... [Read more...]

Modelling Occurence of Events, with some Exposure

July 28, 2015 | 0 Comments

This afternoon, an interesting point was raised, and I wanted to get back on it (since I did publish a post on that same topic a long time ago). How can we adapt a logistic regression when all the observations do not have the same exposure. Here the model is ... [Read more...]

Efficient Accumulation in R

July 28, 2015 | 0 Comments

by John MountData Scientist, Win-Vector LLC R has a number of very good packages for manipulating and aggregating data (plyr, sqldf, RevoScaleR, data.table, and more), but when it comes to accumulating results the beginning R user is often at sea. The... [Read more...]

The complete catalog of argument variations of select() in dplyr

July 28, 2015 | 0 Comments

When I read the dplyr vignette, I found a convenient way to select sequential columns such as select(data, year:day). Because I had inputted only column names to select() function, I was deeply affected by the convenient way. On closer inspection, I found that the select() function accepts many ... [Read more...]

Visualising Claims Frequency

July 28, 2015 | 0 Comments

A few years ago, I did publish a post to visualize and empirical claims frequency in a portfolio. I wanted to update the code. Here is a code to get a dataset, sinistre
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Notes from the 3rd R in Insurance Conference

July 28, 2015 | 0 Comments

Photo: Arthur CharpentierThe R in Insurance conference in Amsterdam was a sold out success! Congratulations to the organising committee at the University of Amsterdam, and many thanks to our sponsors: Milliman, RStudio, CYBAEA, Deloitte, a.s.r., Triple... [Read more...]

Notes from the 3rd R in Insurance Conference

July 28, 2015 | 0 Comments

Photo: Arthur CharpentierThe R in Insurance conference in Amsterdam was a sold out success! Congratulations to the organising committee at the University of Amsterdam, and many thanks to our sponsors:Milliman, RStudio, CYBAEA, Deloitte, a.s.r., Triple ... [Read more...]

upsetplot in ChIPseeker

July 28, 2015 | 0 Comments

ChIPseeker is an R package for ChIP peak annotation, comparison and visualization. We have implemented several visualization methods, including vennpie that was designed for viewing annotation overlap as shown below: Read More: 457 Words Totally
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