Another wishlist for R

On 26 Jan 2004 15:17:01 +0100, Peter Dalgaard
<p.dalgaard@biostat.ku.dk> wrote :

Either setup so that cat() will be used to print it (add class + print
method) or return noquote(....) The latter will give this effect:

noquote("function (x, y = NULL, type = \"p\", xlim = NULL, ylim = NULL, ")

[1] function (x, y = NULL, type = "p", xlim = NULL, ylim = NULL,

i.e. include line numbers.

I think this produces a nice display:

tail.function

function (x, n = 6) {
    lines <- matrix(deparse(x),ncol=1)

    rownames(lines) <- 1:nrow(lines)
    colnames(lines) <- ''
    noquote(tail(lines,n=n))
}

tail(plot.default)

                                                                   
36         box(...)                                                
37     if (ann)                                                    
38         title(main = main, sub = sub, xlab = xlab, ylab = ylab, 
39             ...)                                                
40     invisible()                                                 
41 }                        

Unfortunately, I doubt if people would really want the result to be a
matrix, so maybe a new class is what is needed.