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Filtering with dplyr Using Strings as Expressions

Kenneth Tay shows how to build arbitrary expressions to execute in dplyr’s filter function:

This took me a while to figure out and so I thought I would post this as future reference. Let’s say I have the mtcars data and I want to filter for just the rows with cyl == 6. I would do something like this:

mtcars %>% filter(cyl == 6)

What if I had the filter condition as a string instead?

Read on to see how you can do this. Given the answer, I wonder if there’s any chance that could be turned into an injection vulnerability. H/T R-Bloggers