2014年11月25日 · 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 ...

2022年1月11日 · R provides two different methods for accessing the elements of a list or data.frame: [] and [[]]. What is ...

2015年1月27日 · R Language Collective Join the discussion. This question is in a collective: a subcommunity defined by ...

2011年1月5日 · Is there a difference between ^[a-zA-Z] and [^a-zA-Z]? When I check in C#, Regex.IsMatch("t", "^[a-zA-Z]") // Returns true (I think it's correct) Regex.IsMatch("t ...

@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.

2015年7月31日 · \r\n(CR+LF)：Windows系OS \r(CR)：古いMac OS（9以前） コンピュータ上の表現としては\n1文字で扱うのが自然ですが、もともとタイプライター由来で\r\nが利用されていたという歴史的経緯があります。（CRが印字装置を左端に戻す動作＋LFが紙を1行分スクロール …

When using renv in an R project, should the renv package be included in a renv.lock file or would it be best to exclude it. I cloned an R project repository that had renv version 0.15.5 recorded in ...

On "old" printers, \r sent the print head back to the start of the line, and \n advanced the paper by one line. Both were therefore necessary to start printing on the next line. Obviously that's somewhat irrelevant now, although depending on the console you may still be able to use \r to move to the start of the line and overwrite the existing ...

2016年1月6日 · 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

2019年5月14日 · ^[A-Za-z0-9_.]+$ From beginning until the end of the string, match one or more of these characters. Edit: Note that ^ and $ match the beginning and the end of a line.