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collatz <- function(num) {
  if (num <= 0)
    stop("num must be positive")
  else if (num == 1)
    return(0)
  else if (num %% 2 == 0)
    return(1 + collatz(num / 2))
  else
    return(1 + collatz(3 * num + 1))
}

35 coding exercises for R on Exercism. From Scrabble Score to Word Count.


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Key Features of R


R

Domain Specific

R is a language and environment for statistical computing and graphics.

Cross-platform

It is free, open source, and available on every major platform.

Multi-paradigm

R has a functional programming foundation, but facilitates procedural or object-oriented approaches.

Metaprogramming

R’s metaprogramming capabilities allow for magically succinct and concise functions.

Tooling

R provides powerful tools for data manipulation, visualisation, modelling, and machine learning.

Community

R has a diverse and welcoming community.

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Every language has its own way of doing things. R is no different. Our mentors will help you learn to think like a R developer and how to write idiomatic code in R. Once you've solved an exercise, submit it to our volunteer team, and they'll give you hints, ideas, and feedback on how to make it feel more like what you'd normally see in R - they'll help you discover the things you don't know that you don't know.

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Community-sourced R exercises

The R track on Exercism has 35 exercises to help you write better code. Discover new exercises as you progress and get engrossed in learning new concepts and improving the way you currently write.

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R

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