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The dplyr package introduced the %.% operator to pass the left hand side as an argument of the function on the right hand side, similar to a *NIX pipe. The magrittr package is a much more lightweight package that exists to define only that pipe-like operator.
Yet one uses %.% and the other %>%.
Is there any difference between the two? Can I just use %>% even in dplyr code, or will that cause subtle bugs?
On inspecting the code, they take very different paths early on, so simple eyeball comparison would suggest that they're different. I haven't been able to find anything documented when I search the web for them, nor have I run across anything in the documentation itself.
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1 Answer. %>% is called the forward pipe operator in R. It provides a mechanism for chaining commands with a new forward-pipe operator, %>%. This operator will forward a value, or the result of an expression, into the next function call/expression.
To achieve its humble aims, magrittr (remember the accent) provides a new “pipe”-like operator, %>% , with which you may pipe a value forward into an expression or function call; something along the lines of x %>% f , rather than f(x) .
magrittr is the package home to the %>% pipe operator written by Stefan Milton Bache and used throughout the tidyverse.
Overview. The magrittr package offers a set of operators which make your code more readable by: structuring sequences of data operations left-to-right (as opposed to from the inside and out), avoiding nested function calls, minimizing the need for local variables and function definitions, and.
See the very first item in the current NEWS file:
dplyr now imports
%>%from magrittr (#330). I recommend that you use this instead of%.%because it is easier to type (since you can hold down the shift key) and is more flexible
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dplyr now imports %>% from magrittr and uses it by default. See this answer for details.
Differences include
you can use a . as placeholder for the left-hand side, e.g.
iris %>% plot(Sepal.Length ~ Sepal.Width, data = .) %>% respects (rhs), e.g.
1:10 %>% (call("sum")) 1:10 %>% (function(x) x^2 + 2*x) For a more useful example of this, see
https://gist.github.com/anonymous/0c69b019d0b4f6ae5050
For single argument function calls, you can omit parens:
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