Monthly Archives: October 2015

Factor codings for models in R

Factor codings for models in R

I am holding an exercise on generalised models these days. Preparing a task on factor coding in generalised linear models, I realised that the help on the internet on that is not so easy to understand. At least what I found. So in order to help people ...

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RcppArmadillo 0.6.200.2.0

October 31, 2015
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RcppArmadillo 0.6.200.2.0

Yet another monthly upstream Armadillo update gets us the first changes to the new the 6.* series. This was preceded by two uploads of test released to GitHub-only. These two were tested both against all reverse-dependencies as usual. A matching upload to Debian will follow shortly. Armadillo is a powerful and expressive C++...

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Call for Help: Front-End Javascript/.NET Web App Developer

October 31, 2015
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Dear Fantasy Football Analytics Community, Two years ago, we released web apps to help people make better decisions in fantasy football based on the wisdom of the crowd.  Over the past The post Call for Help: Front-End Javascript/.NET Web App Developer appeared first on Fantasy Football Analytics.

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Don’t use stats::aggregate()

October 31, 2015
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When working with an analysis system (such as R) there are usually good reasons to prefer using functions from the “base” system over using functions from extension packages. However, base functions are sometimes locked into unfortunate design compromises that can now be avoided. In R’s case I would say: do not use stats::aggregate(). Read on … Continue reading...

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Why bother with magrittr

October 31, 2015
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Why bother with magrittr

I’ve seen R users swooning over the magrittr package for a while now, but I couldn’t make heads or tails of all these scary %>% symbols. Finally I had time for a closer look, and it seems potentially handy indeed. … Continue reading →

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Competing views on Argentina’s Frontrunner

October 30, 2015
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Competing views on Argentina’s Frontrunner

It might be too early to state anything solid, but the few polls prospecting the runoff election in Argentina seem to be telling two distinct histories. Hugo Haime and IPSOS suggest Daniel Scioli is going up while Elypsis and Polldata say he’s sinking as weeks go by. The last poll published today by Polldata put...

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The Traveling Vampire Problem

October 30, 2015
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The Traveling Vampire Problem

Let's say you are a vampire and you would like to figure out the shortest route to visit the supplenecks of N maidens. But, there is only so much time in any night!You can fly from location to location, ignoring barriers.With a few maidens, the problem...

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Fruit Plot: Plotting Using Multiple PNGs

October 30, 2015
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Fruit Plot: Plotting Using Multiple PNGs

In one of our previous posts (Halloween: An Excuse for Plotting with Icons), we gave a quick tutorial on how to plot using icons using ggplot. A reader, Dr. D. K. Samuel asked in a comment how to use multiple … Continue reading →

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Data Science Workbench for Ubuntu 14.04

October 30, 2015
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I found myself installing the same things over and over again on my VMs, so I decided to pack all my good DSR workbench action into one giant shell script that I could run and walk away from. Below is my markdown file, you can grab the shell scripts at my GitHub page. The script

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Demo: R in SQL Server 2016

October 30, 2015
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At the PASS Summit in Seattle this week, Microsoft's Jason Wilcox and Gopi Kumar demonstrated a SQL Server 2016 application that embeds R to predict what time you need to leave to catch a flight, given traffic, check-in time, and the likelihood of a flight leaving early or being delayed. The underlying preditive model was created with the RevoScaleR...

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