[R] controlling printing precision in paste()

[Dimitris Rizopoulos]

Hi RenE,

you could easily modify the "paste" function to get what you want, 
i.e.,

paste. <- function (..., digits=16, sep=" ", collapse=NULL) {
    args <- list(...)
    if (length(args) == 0)
        if (length(collapse) == 0)
            character(0)
        else ""
    else{
        for(i in seq(along=args))
            if(is.numeric(args[[i]])) args[[i]] <- 
as.character(round(args[[i]], digits)) else args[[i]] <- 
as.character(args[[i]])
        .Internal(paste(args, sep, collapse))
    }
}
############
x <- rnorm(3)
x
paste.("x1=", x[1], ", x2=", x[2], ", x3=", x[3], sep="", 
collapse=",")
paste.("x1=", x[1], ", x2=", x[2], ", x3=", x[3], digits=3, sep="", 
collapse=",")


I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/16/396887
Fax: +32/16/337015
Web: http://www.med.kuleuven.ac.be/biostat/
     http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm


----- Original Message ----- 
From: "RenE J.V. Bertin" <rjvbertin at hotmail.com>
To: <r-help at r-project.org>
Sent: Friday, September 17, 2004 3:21 PM
Subject: [R] controlling printing precision in paste()


> Hello,
>
> I can't seem to find the way to modify the precision with which 
> paste() prints its floating point numbers, more precisely the number 
> of decimal digits printed. This is apparently not controlled by 
> options( digits= ), and there is no appropriate argument to paste() 
> itself.
>
> Is this possible, and if so, how? Does one have to use round() for 
> all individual arguments, or is there a more global approach?
>
> Thanks,
> RenE Bertin
>
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