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I was reviewing some public code and came across an expression that I'm not familiar with at all:

clv <- orders %>%
  group_by(clientId) %>%
  summarise(clv=sum(grossmarg))

What does %>% mean?

Thank you.

BlackHat
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    This will get you started: http://www.r-statistics.com/2014/08/simpler-r-coding-with-pipes-the-present-and-future-of-the-magrittr-package/ – Chris Apr 22 '15 at 17:45
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    See http://stackoverflow.com/questions/27125672/what-does-function-mean-in-r – G. Grothendieck Apr 22 '15 at 18:39

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