December 2018

Clustering the Bible

December 27, 2018 | Learning Machines

During this time of year there is obviously a lot of talk about the Bible. As most people know the New Testament comprises four different Gospels written by anonymous authors 40 to 70 years after Jesus’ supposed crucifiction. Unfortunately we have lost all of the originals but only retained copies of copies ... [Read more...]

The Christmas Eve Selloff was a Classic Capitulation

December 26, 2018 | quintuitive

The selloff on Christmas eve was so bad it looked like a typical bear market capitulation. The following rally merely confirmed it. As mentioned in the last post, at the time the correction reached 16%, at the close of December 21st, the oversold indicator was not lighted. What followed was the ... [Read more...]

Some fun with {gganimate}

December 26, 2018 | Econometrics and Free Software

Your browser does not support the video tag. In this short blog post I show you how you can use the {gganimate} package to create animations from {ggplot2} graphs with data from UNU-WIDER. WIID data Just before Christmas, UNU-WIDER released a new edition of their World Income Inequality Database: *NEW #... [Read more...]

Le Monde puzzle [#1076]

December 26, 2018 | xi'an

A cheezy Le Monde mathematical puzzle : (which took me much longer to find [in the sense of locating] than to solve, as Warwick U does not get a daily delivery of the newspaper [and this is pre-Brexit!]): Take a round pizza (or a wheel of Gruyère) cut into seven ...
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Very shiny holidays!

December 26, 2018 | Sebastian Wolf

How would I miss to program just a little bit during the holiday season? But I didn’t want to work on something serious, so I decided to checkout some ground work on R-Shiny + JQuery + CSS. The result are some nice holiday greetings inside a shiny app: An app to ...
[Read more...]

Very shiny holidays

December 26, 2018 | Sebastian Wolf

How would I miss to program just a little bit during the holiday season? But I didn’t want to work on something serious, so I decided to checkout some ground work on R-Shiny + JQuery + CSS. The result are some nice holiday greetings inside a shiny app: I just googled ... [Read more...]

Survey Raking: An Illustration

December 25, 2018 | R on datawookie

Analysing survey data can be tricky. There’s often a mismatch between the characteristics of the survey respondents and and those of the general population. If the discrepancies are not accounted for then the survey results can (and generally will!) be misleading. A common approach to this problem is to ...
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Statistical Assessments of AUC

December 25, 2018 | statcompute

In the scorecard development, the area under ROC curve, also known as AUC, has been widely used to measure the performance of a risk scorecard. Given everything else equal, the scorecard with a higher AUC is considered more predictive than the one with a lower AUC. However, little attention has ... [Read more...]

Rolling Origins and Fama French

December 25, 2018 | R Views

Today, we continue our work on sampling so that we can run models on subsets of our data and then test the accuracy of the models on data not included in those subsets. In the machine learning prediction world, these two data sets are often called training data and testing ...
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Advent of Code Day 14

December 24, 2018 | LeaRning Stats

Introduction Advent of code 2018, day 14, was a tough one to do in R. Here is a link. I did this problem a lot of different ways, trying to find a nice way to do it. In the end, I did it using vectors in base R, data.table and finally ... [Read more...]

Day 24 – big helper helfRlein

December 24, 2018 | Jakob Gepp

In the last 23 days I presented one function each day from the helfRlein package we created here at STATWORX. I hope you found some of the functions useful and had some fun discovering new ways of doing things with R! Since today is Christmas, only one thing remains to say: ...
[Read more...]
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