Blog Archives

Modelling with R: part 1

September 29, 2011
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Modelling with R: part 1

When I started work about 3 months ago, I didn't know much more than loading data and executing standard Econometric commands in R. But now I feel much much much more confident in using R for work, for research, for puzzles, and sometimes just for fun....

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Project Euler: problem 6

September 27, 2011
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Project Euler: problem 6

The sum of the squares of the first ten natural numbers is,12 + 22 + ... + 102 = 385The square of the sum of the first ten natural numbers is,(1 + 2 + ... + 10)2 = 552 = 3025Hence the difference between the sum of the squares o...

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Project Euler: problem 3

September 21, 2011
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Project Euler: problem 3

The prime factors of 13195 are 5, 7, 13 and 29.What is the largest prime factor of the number 600851475143 ?This one was quite easy, and much easier in R as it turns out.The GNU Multi-Precision Library (GMP) is available as a package in R. So the only ...

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Introduction to Beamer

September 17, 2011
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Introduction to Beamer

A friend of mine, who is quite smart by the way (she is a PhD. student in Physics at Cambridge), recently asked me for some help with Beamer. Well most of my knowledge and code came from Utkarsh when I had started about a year ago. Initially, I ha...

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Project Euler: problem 2

September 16, 2011
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Project Euler: problem 2

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...By considering the terms in the Fibonacci sequence whose values do not exc...

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Project Euler: problem 1

September 15, 2011
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Project Euler: problem 1

To be fairly honest (assuming there are degrees of honesty), I do know a little about math and programming but I don't know much math or any programming. I've loved math for a long time, but started to learn and understand fairly recently. So during th...

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