[R] Splitting vector into individual elements

[Spencer Graves]

      Have you considered "do.call": 

 > do.call("rgb", as.list((1:3)/10))
[1] "#1A334C"

same as: 
 > rgb(.1, .2, .3)
[1] "#1A334C"

      Hope this helps.  spencer graves

Paul Roebuck wrote:

>Is there a means to split a vector into its individual
>elements without going the brute-force route for arguments
>to a predefined function call?
>
>    offred.rgb <- c(1, 0, 0) * 0.60;
>
>    ## Brute force style
>    offred.col <- rgb(offred.rgb[1],
>                      offred.rgb[2],
>                      offred.rgb[3],
>                      names = "offred")
>    ## Desired style
>    offred.col <- rgb(silver.bullet(offred.rgb),
>                      names = "offred")
>
>Neither of my attempts gets it right.
>
>    silver.bullet.try1 <- function(x) {
>        expr <- cat(x, sep = ",")
>        return(parse(text = expr))
>    }
>
>    silver.bullet.try2 <- function(x) {
>        expr <- expression(cat(x, sep = ","))
>        return(eval(expr))
>    }
>
>----------------------------------------------------------
>SIGSIG -- signature too long (core dumped)
>
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-- 
Spencer Graves, PhD, Senior Development Engineer
O:  (408)938-4420;  mobile:  (408)655-4567