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Code Examples

On this page you will find all code examples used in the book. If something is missing or wrong, please let me know! Twitter is best: @natureincode. Alternatively, you can send me email at lastname.firstname@gmail.com.

Thanks,
Marcel Salathé
@marcelsalathe

Chapter 2: The Genes, They Are a-Changin'

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Setting up: The "Hello, nature" example

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Our first line of JavaScript

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Calculating allele frequencies from genotype frequencies

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Calculating genotype frequencies in the next generation

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The final Hardy Weinberg code

Chapter 3: Genetic Drift: The Power of Chance

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Generating random numbers

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Coin tossing example

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Testing the prediction that 10 coin tosses will yield 8 heads and 2 tails 4.39% of the time

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Genetic Drift

Genetic Drift Visualized

Genetic Drift: The Effect of Population Size

Effective population size, with a bottleneck of N=10 every 10th generation

Effective population size as a function of the sex ratio

Chapter 4: Mutation: The Power of Mistakes

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Mutation of the genetic code

Genetic variance: population size and mutation rate

Code Examples

Chapter 2: The Genes, They Are a-Changin'

Chapter 3: Genetic Drift: The Power of Chance

Chapter 4: Mutation: The Power of Mistakes

Chapter 5: Migration: Spatial Models

Chapter 6: Natural Selection: The Best Idea Anyone's Ever Had

Chapter 7: Epidemics: The Spread of Infectious Diseases

Chapter 8: Cooperation: Good Guys Can Finish First