Re: [Rd] Another wishlist for R

[Patrick Burns]

Prof Brian Ripley wrote:

On Mon, 26 Jan 2004, Duncan Murdoch wrote:

 

On 26 Jan 2004 15:17:01 +0100, Peter Dalgaard
<[EMAIL PROTECTED]> 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)
   

I would just use as.matrix(deparse(x)).

 

   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.
   

I knew this happened, but I did not know what people wanted.  I can only 
see this being used interactively (it at all: I would use page), so that 
seems as good as any.

 

I like Duncan's idea.  I doubt I have ever used head on a function
for real, but tail of a function can be handy for seeing the structure
of the return value.  I agree that this is only likely to be used 
interactively.

Pat

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