slice() vs. head() (and do)

[Bob]

Hi All,

I just had a "Doh!" moment I thought I'd share. I had not really caught on to the importance of the slice() function. It seemed just like head() or tail(). Then I used head() on a data frame that had been run through group_by(). It only printed the head of the whole data frame since it has no idea that the grouped indices were set.  slice() did it by group of course. That's where do() comes in. It can make any function work on group_by info and so it can make head() work like slice() on grouped data, but slice() is so much easier.

Cheers,
Bob

[Grant Rettke]

Thanks for sharing that experience; it is valuable to those learning
this framework.

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--
Grant Rettke
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