{"product_id":"9780367782375","title":"Testing R Code","description":"Learn how to write R code with fewer bugs.The problem with programming is that you are always one typo away from writing something silly. Likewise with data analysis, a small mistake in your model can lead to a big mistake in your results. Combining the two disciplines means that it is all too easy for a missed minus sign to generate a false prediction that you don’t spot until it’s too late. Testing is the only way to be sure that your code, and your results, are correct.Testing R Code teaches you how to perform development-time testing using the testthat package, allowing you to ensure that your code works as intended. The book also teaches run-time testing using the assertive package; enabling your users to correctly run your code.After beginning with an introduction to testing in R, the book explores more advanced cases such as integrating tests into R packages; testing code that accesses databases; testing C++ code with Rcpp; and testing graphics. Each topic is explained with real-world examples, and has accompanying exercises for readers to practise their skills — only a small amount of experience with R is needed to get started!","brand":"Richard Cotton","offers":[{"title":"Default Title","offer_id":45766408503614,"sku":"9780367782375","price":2942.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4357\/7662\/products\/9780367782375_2aa0123e-4e5f-4b4a-941c-d0a592761f84.jpg?v=1707248489","url":"https:\/\/exclusivebooks.co.za\/products\/9780367782375","provider":"Exclusive Books Online","version":"1.0","type":"link"}