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Nov 25, 2014 · Update 2 R has defined a |> pipe. Unlike magrittr's %>% it can only substitute into the first argument of the right hand side. Although limited, it works via syntax transformation so it has no performance impact. As of R v4.1.0, |>, is included in base-R and being advocated by the Tidyverse in place of %>% for most use cases. See R for Data ...
The shorter form performs elementwise comparisons in much the same way as arithmetic operators. The longer form evaluates left to right examining only the first element of each vector. Evaluation proceeds only until the result is determined. The longer form is appropriate for programming control-flow and typically preferred in ‘if’ clauses.
Jan 6, 2016 · in old Mac systems (pre-OS X), \r was the code for end-of-line instead; in Windows (and many old OSs), the code for end of line is 2 characters, \r\n, in this order; as a (surprising;-) consequence (harking back to OSs much older than Windows), \r\n is the standard line-termination for text formats on the Internet
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The infix operator %>% is not part of base R, but is in fact defined by the package magrittr and is heavily used by dplyr . It works like a pipe, hence the reference to Magritte's famous painting The Treachery of Images.
Jul 26, 2012 · I think it is because % has often be associated with the modulus operator in many programming languages. It is the case, e.g., in C, C++, C# and Java, and many other languages which derive their syntax from C (C itself took it from B).
@Konrad Rudolph R uses some rules/principles when designing the language and code interpretation for efficiency and usability that not saw in other languages. I believe most people who ask the difference between = and <- is curious about why R has more than one assignment operator compared with other popular Science/math language such as Python.
Reading from "Introducing Monte Carlo Methods with R", by Robert and Casella: "The assignment operator is =, not to be confused with ==, which is the Boolean operator for equality. An older assignment operator is <-and, for compatibility reasons, it still remains functional, but it should be ignored to ensure cleaner programming. (As pointed ...
Feb 20, 2013 · I saw in a tutorial about regression modeling the following command: myFormula <- Species ~ Sepal.Length + Sepal.Width + Petal.Length + Petal.Width What exactly does this command do, and what i...
Aug 26, 2011 · @naught101 I wouldn't consider it unusual by R's standards. Vector recycling is a common property of R functions. Keep in mind that 'blah' is a vector of length 1. The recycling property makes it easy to do something like paste0("blah", 1:3) to get "blah1" "blah2" "blah3". –
