June 2018

The Fundamental Principles of Analytical Design

June 21, 2018 | 0 Comments

I have just finished reading the book Beautiful Evidence by Edward Tufte and in it he talks about the fundamental principles of analytical design. Henri Matisse I do not paint things, I paint only the differences between things Show Comparisons, Contrasts, Differences When looking at a graph or reading a ...
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Bradley Terry

June 21, 2018 | 0 Comments

You might be reading other sites and see lots of posts on ELO models this post isn’t about building an ELO model yourself that’s another post. This post is about how to apply Bradley Terry models for AFL Why Bother? Each of the 18 footy teams plays 22 games a ... [Read more...]

A Comparative Review of the BlueSky Statistics GUI for R

June 21, 2018 | 0 Comments

Introduction BlueSky Statistics’ desktop version is a free and open source graphical user interface for the R software that focuses on beginners looking to point-and-click their way through analyses.  A commercial version is also available which includes technical support and a … Continue reading →
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Non-Linear Model in R Exercises

June 21, 2018 | 0 Comments

A mechanistic model for the relationship between x and y sometimes needs parameter estimation. When model linearisation does not work,we need to use non-linear modelling. There are three main differences between non-linear and linear modelling in R: 1. specify the exact nature of the equation 2. replace the lm() with nls() ... [Read more...]

Score Involvements

June 20, 2018 | 0 Comments

Got an email from someone who was reading the footballistics book they were really into it and got up to chapter 3. They must be a really big Western Bulldogs fan who has a lot of theories as to why after their premiership year in 2016 it seems they have dropped off ... [Read more...]

Articles worth reading June 2018

June 20, 2018 | 0 Comments

:skull: marks article you’ll need resilience to what you read, as it may impact you deep :hearts: marks articles easy and positive :man: marks article for men :woman: same for women [Read more...]

Scraping Responsibly with R

June 20, 2018 | 0 Comments

I recently wrote a blog post here comparing the number of CRAN downloads an R package gets relative to its number of stars on GitHub. What I didn’t really think about during my analysis was whether or not scraping CRAN was a violation of its Terms and Conditions. I ...
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Explaining Keras image classification models with lime

June 20, 2018 | 0 Comments

Last week I published a blog post about how easy it is to train image classification models with Keras. What I did not show in that post was how to use the model for making predictions. This, I will do here. But predictions alone are boring, so I’m adding ...
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Scraping Responsibly with R

June 20, 2018 | 0 Comments

I recently wrote a blog post here comparing the number of CRAN downloads an R package gets relative to its number of stars on GitHub. What I didn’t really think about during my analysis was whether or not scraping CRAN was a violation of its Terms and Conditions. I ...
[Read more...]

Le Monde puzzle [#1053]

June 20, 2018 | 0 Comments

An easy arithmetic Le Monde mathematical puzzle again: If coins come in units of 1, x, and y, what is the optimal value of (x,y) that minimises the number of coins representing an arbitrary price between 1 and 149?  If the number of units is now four, what is the optimal choice? ...
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PYPL Language Rankings: Python ranks #1, R at #7 in popularity

June 20, 2018 | 0 Comments

The new PYPL Popularity of Programming Languages (June 2018) index ranks Python at #1 and R at #7. Like the similar TIOBE language index, the PYPL index uses Google search activity to rank language popularity. PYPL, however, fcouses on people searching for tutorials in the respective languages as a proxy for popularity. By ... [Read more...]

Neural Networks Are Essentially Polynomial Regression

June 20, 2018 | 0 Comments

You may be interested in my new arXiv paper, joint work with Xi Cheng, an undergraduate at UC Davis (now heading to Cornell for grad school); Bohdan Khomtchouk, a post doc in biology at Stanford; and Pete Mohanty,  a Science, Engineering & Education Fellow in statistics at Stanford. The paper is ... [Read more...]

The Shape of the Other: The Evolution of UFO Sightings by Shape

June 20, 2018 | 0 Comments

In earlier analyses of the UFO phenomenon, based on the NUFORC dataset, we have examined the global density of sightings, and the relative distribution of sightings against the location of military bases in the United States. All of these analyses have, however, considered individual sightings to be more or less... [Read more...]

Intro To Time Series Analysis Part 2 :Exercises

June 19, 2018 | 0 Comments

In the exercises below, we will explore more in Time Series analysis.The previous exercise is here,Please follow this in sequence Answers to these exercises are available here. Exercise 1 load the AirPassangers data,check its class and see the start and end of the series . Exercise 2 check the cycle ... [Read more...]

Regression to the Mean

June 19, 2018 | 0 Comments

We also see this in sports, Hollinger refers to it as the fluke rule. Bill James calls it the plexiglas principle, you might call it the Sports Illustrated Jinx. They all are different names from different people who have observed the same thing mean reversion or regression to the mean. ...
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Speed Up Shiny Coding with Data

June 19, 2018 | 0 Comments

Introduction In this excercise, I’m going to show how to automate some aspects of coding in shiny to speed up development. Traditionally, in user interface development, one has to explicitly type out each individual input argument. For small applications, this is justified and probably isn’t worth the time ...
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