# Blog Archives

## Data Pseudo-Science: Developing a Biorhythm Calculator

March 29, 2017
By Data science is a pretty serious occupation. What about data pseudoscience? This blog post shows how to calculate your biorhythm using R. Continue reading → The post Data Pseudo-Science: Developing a Biorhythm Calculator appeared first on The Devil is in the Data.

## Euler Problem 17: Number Letter Counts

March 22, 2017
By A solution in the R language to Euler Problem 17: If all the numbers from 1 to 1000 inclusive were written out in words, how many letters would be used? Continue reading → The post Euler Problem 17: Number Letter Counts appeared first on The Devil is in the Data.

## Euler Problem 16: Power Digit Sum

March 15, 2017
By A solution in the R language to Euler Problem 16. What is the sum of the digits of the number 2^1000? This post provides a solution using basic r code. Continue reading → The post Euler Problem 16: Power Digit Sum appeared first on The Devil is in the Data.

## Tic Tac Toe Simulation — Random Moves

March 12, 2017
By Tic Tac Toe might be a futile children’s game but it can also teach us about artificial intelligence. Tic Tac Toe, or Naughts and Crosses, is a zero-sum game with perfect information. Both players know exactly what the other did and when nobody … Continue reading → The post Tic Tac Toe Simulation — Random Moves appeared first on The Devil is in...

## Euler Problem 15: Pathways Through a Lattice

March 9, 2017
By Solution in the R language to project Euler Problem 15. The problem asks to calculate the number of pathways through a 20 by 20 grid. Continue reading → The post Euler Problem 15: Pathways Through a Lattice appeared first on The Devil is in the Data.

## Create Air Travel Route Maps in ggplot: A Visual Travel Diary

March 6, 2017
By Create Air Travel Route Maps that look like airline route maps you find in aeroplane magazines using ggplot. Spatially visualise your travel diary. Continue reading → The post Create Air Travel Route Maps in ggplot: A Visual Travel Diary appeared first on The Devil is in the Data.

## Euler Problem 14: Longest Collatz Sequence

March 1, 2017
By $Euler Problem 14: Longest Collatz Sequence$

Euler Problem 14 looks at the Collatz Conjecture. These playful sequences, named after German mathematician Lothar Collatz (1910–1990), cause mathematicians a lot of headaches. This video introduces the problem much better than I can describe it. Euler Problem 14 Definition The following iterative … Continue reading → The post Euler Problem 14: Longest Collatz Sequence appeared first on The Devil is in the...

## Euler Problem 13: Large Sum of 1000 Digits

February 22, 2017
By $Euler Problem 13: Large Sum of 1000 Digits$

Euler Problem 13 asks to add one hundred numbers with fifty digits. This seems like a simple problem where it not that most computers are not designed to deal with numbers with a lot of integers. For example:   When asking … Continue reading → The post Euler Problem 13: Large Sum of 1000 Digits appeared first on The Devil is...

## Euler Problem 12: Highly Divisible Triangular Number

February 15, 2017
By Proposed solution for Euler Problem 12 in the R language. What is the value of the first triangle number to have over five hundred divisors? Continue reading → The post Euler Problem 12: Highly Divisible Triangular Number appeared first on The Devil is in the Data.

## Percentile Calculations in Water Quality Regulations

February 9, 2017
By Demonstrating the various ways percentile calculations can be undertaken in R and specifically with respect to measuring turbidity in water supplies. Continue reading → The post Percentile Calculations in Water Quality Regulations appeared first on The Devil is in the Data.