Hello, everyone! Does anyone know how make some symbols have special means in R? For example, we know that "+" in R means the sum of the two operand on its left and right. I want to define some operators in R by myself. Is this possible? Regards! -- Chuanlong Du Department of Statistcis Iowa State University Ames, IA, US 50011 [[alternative HTML version deleted]]
On Mar 30, 2011, at 11:04 AM, Chuanlong Du wrote:> Hello, everyone! > > Does anyone know how make some symbols have special means in R? For > example, > we know that "+" in R means the sum of the two operand on its left and > right. I want to define some operators in R by myself. Is this > possible?You can create your own infix operators by surrounding them with matching percent signs: `%` ?"%in%" -- David Winsemius, MD Heritage Laboratories West Hartford, CT
Hi, you may overwrite existing opreators in the current environment for example:> `+` <- `*` > 2+3[1] 6 Regards! On Wed, Mar 30, 2011 at 10:04:19AM -0600, Chuanlong Du wrote:> Hello, everyone! > > Does anyone know how make some symbols have special means in R? For example, > we know that "+" in R means the sum of the two operand on its left and > right. I want to define some operators in R by myself. Is this possible? > > Regards! > > -- > Chuanlong Du > Department of Statistcis > Iowa State University > Ames, IA, US 50011 > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.
Try this: `%a%` <- function(x, y)paste(x, y, sep = ',') 2 %a% 3 On Wed, Mar 30, 2011 at 1:04 PM, Chuanlong Du <dclong at iastate.edu> wrote:> Hello, everyone! > > Does anyone know how make some symbols have special means in R? For example, > we know that "+" in R means the sum of the two operand on its left and > right. I want to define some operators in R by myself. Is this possible? > > Regards! > > -- > Chuanlong Du > Department of Statistcis > Iowa State University > Ames, IA, US 50011 > > ? ? ? ?[[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >-- Henrique Dallazuanna Curitiba-Paran?-Brasil 25? 25' 40" S 49? 16' 22" O
Hi, Also, try this and rm() it immediately, `+` <- function(x, y) x - y 1+1 rm(`+`) 1+1 baptiste On 31 March 2011 05:04, Chuanlong Du <dclong at iastate.edu> wrote:> Hello, everyone! > > Does anyone know how make some symbols have special means in R? For example, > we know that "+" in R means the sum of the two operand on its left and > right. I want to define some operators in R by myself. Is this possible? > > Regards! > > -- > Chuanlong Du > Department of Statistcis > Iowa State University > Ames, IA, US 50011 > > ? ? ? ?[[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >