The assertr package has some wonderful validation constructs: even if you don’t spend a lot of time in R, it’s worth reading this piece purely for its approach to scale-able data validation.
The code examples and the comments with replies are a must read too as I think if you add the article, the examples and the questions it adds to the complete value in looking at this. Definitely worth a look for anyone who uses R but can also give some overall help for anyone who validates data.
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