Blog Archives

Elo and EloBeta models in snooker

July 2, 2018
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Elo and EloBeta models in snooker

Research about adequacy of Elo based models applied to snooker match results. Contains a novel approach (EloBeta) targeted for sport results with variable "best of N" format. Prologue For many years I’ve been following snooker as a sport. It has it all: hypnotic beauty of smart play, elegance of cue strikes...

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Animating mode variability with tidyverse and tweenr

June 13, 2018
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Animating mode variability with tidyverse and tweenr

Provided different probability distributions, animate independent sample distributions to demonstrate mode variability. There is a thorough code description with some subtle tips and tricks. Prologue Not so long time ago I encountered the following task: given several groups of samples (one group - several samples from one distribution) make a visual...

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Harry Potter and rankings with comperank

May 30, 2018
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Ranking Harry Potter books with comperank package. Prologue Package comperank is on CRAN now. It offers consistent implementations of several ranking and rating methods. Originally, it was intended to be my first CRAN package when I started to build it 13 months ago. Back then I was very curious to learn...

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General gems of comperes

May 16, 2018
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Examples of exported functions from comperes package that could be useful for general tasks. Prologue I am very glad to announce that my new package comperes is on CRAN now. It provides tools for managing competition results in a tidy manner as much as possible. For more information go to: Package README. Package...

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Harry Potter and competition results with comperes

May 8, 2018
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Harry Potter and competition results with comperes

Exploration of Harry Potter Books Survey results with help of my new comperes package. Prologue About a month ago I decided to add interesting data set to my almost finished (hopefully, soon to be on CRAN) comperes package. Data should represent results of some not ordinary competition. After some thought I...

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Struggle with Harry Potter Data

April 8, 2018
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Notes about creation of Harry Potter Books Survey. It is not over, I need your help. Prologue Right now I am in the final stage of developing two packages devoted to results of abstract competitions (still not perfectly ready, so use with caution): comperes - infrastructure package for dealing with different formats...

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Tao of Tidygraph

March 5, 2018
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Tao of Tidygraph

Analysis of one interesting alliance graph within tidy network analysis framework. Prologue Quite some time ago I read the fantastic “Tao Te Programming” book by Patrick Burns. You can know this author from his everlasting work “The R Inferno”. “Tao Te Programming” is a vision about what a good programming should be....

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Tao of Tidygraph

March 5, 2018
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Tao of Tidygraph

Analysis of one interesting alliance graph within tidy network analysis framework. Prologue Quite some time ago I read the fantastic “Tao Te Programming” book by Patrick Burns. You can know this author from his everlasting work “The R Inferno”. “Tao Te Programming” is a vision about what a good programming should be....

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Combined outlier detection with dplyr and ruler

December 25, 2017
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Combined outlier detection with dplyr and ruler

Overview of simple outlier detection methods with their combination using dplyr and ruler packages. Prologue During the process of data analysis one of the most crucial steps is to identify and account for outliers, observations that have essentially different nature than most other observations. Their presence can lead to untrustworthy conclusions....

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Usage of ruler package

December 4, 2017
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Usage examples of ruler package: dplyr-style exploration and validation of data frame like objects. Prologue My previous post tells a story about design of my ruler package, which presents tools for “… creating data validation pipelines and tidy reports”. This package offers a framework for exploring and validating data frame like...

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