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並前往https://www.computerworld.com/article/2497319/business-intelligence-beginner-s-guide-to-r-syntax-quirks-you-ll-want-to-know.html?page=2

Beginner's guide to R: Syntax quirks you'll want to know

For more on using grep in R, see this brief writeup on Regular Expressions ... The add-on package sqldf lets you run SQL queries on an R data frame (there ...

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