R help - Dec 2004 - R: functions problem

hi all


how can i see the code inside a particular function? i know one can
simply type the function, eg ls, but sometimes when this is done one
will get "UseMethod("some function name"). (One could also use
"body"
but i have the same problem in this case. )How does one see the code in
this case?

Sometimes it's in <function_name>.default  Eg:
> barplot
function (height, ...) 
UseMethod("barplot")
<environment: namespace:graphics>
> barplot.default
function (height, width = 1, space = NULL, names.arg = NULL, 
    legend.text = NULL, beside = FALSE, horiz = FALSE, density = NULL, 
    angle = 45, col = NULL, border = par("fg"), main = NULL, 
    sub = NULL, xlab = NULL, ylab = NULL, xlim = NULL, ylim = NULL, 
    xpd = TRUE, axes = TRUE, axisnames = TRUE, cex.axis =
par("cex.axis"),
    cex.names = par("cex.axis"), inside = TRUE, plot = TRUE, 
    axis.lty = 0, offset = 0, ...) 
{
    if (!missing(inside)) 
        .NotYetUsed("inside", error = FALSE)
    if (missing(space)) 
        space <- if (is.matrix(height) && beside) 
            c(0, 1)

etc etc

Mick

-----Original Message-----
From:	r-help-bounces at stat.math.ethz.ch on behalf of Clark Allan
Sent:	Mon 12/13/2004 4:14 PM
To:	r-help at stat.math.ethz.ch
Cc:	
Subject:	[R] R: functions problem
hi all


how can i see the code inside a particular function? i know one can
simply type the function, eg ls, but sometimes when this is done one
will get "UseMethod("some function name"). (One could also use
"body"
but i have the same problem in this case. )How does one see the code in
this case?

Two issues are at play here, S3 methods and namespaces. You need to read up
on both. But, in brief, to get an ** exported ** S3 method you need to type:
method.class, e.g. 
>summary.lm
If the method is ** not** exported, you need the ::: operator or look at
?getAnywhere .

-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
 
"The business of the statistician is to catalyze the scientific learning
process."  - George E. P. Box
 
 
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Clark Allan
> Sent: Monday, December 13, 2004 8:15 AM
> To: r-help at stat.math.ethz.ch
> Subject: [R] R: functions problem
> 
> hi all
> 
> 
> how can i see the code inside a particular function? i know one can
> simply type the function, eg ls, but sometimes when this is done one
> will get "UseMethod("some function name"). (One could also
use "body"
> but i have the same problem in this case. )How does one see 
> the code in
> this case?
>