Walter Paczkowski:
> I'd like to look at the code for the R function head. When I type just
> the word head, I get back
>
> function(x, ...)
> UseMethod("head")
> <environment: namespace:utils>
This basically means that 'head' is a generic function that works in
different ways for different classes of objects (data frames, matrices,
tables &c.) Many function, e.g., 'plot' and 'mean', work the same way.
Type ?UseMethod for a better/longer explanation.
Now type
methods(head)
You will get:
[1] head.data.frame* head.default* head.ftable* head.function*
[5] head.matrix head.table*
Now, ordinarily you should be able to write 'head.data.frame' to see the
code for this function, but, since it is starred, '*', this doesn't work.
The easiest way to get hold of it is using 'getAnywhere':
getAnywhere(head.data.frame)
--
Karl Ove Hufthammer
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
