R help - Apr 2003 - Is it possible to have data stuctures like in C ?

I'am a very fresh R user and I'd like to know how I could create such
structures. 

I saw R was objects-oriented but I can not find any doccumentation on
about how to build my hown ojects.

Thanks.

Dear Samuel,

With regards to the second question, essentially everything in R (S) is an 
object. As a simple example, if you do:
> x <- 1:5
x is an object. It has attributes, there are methods appropriate for printing 
it, etc.

As for the first, the simplest thing to use would be a list, where you can 
have named components of different types.
> y <- list(the.first.vector = 1:5, one.character = "a",
another.vector =
10:15)

S4 classes do provide more sophisticated ways of dealing with classes, and 
they might be closer to what you expect from structs in C/C++ and classes in 
C++. S4 are thoroughly documented in Venables & Ripley's "S
Programming" and
in Chambers' "Programming with Data".

But I think you problably should start with the introductory manuals (such as 
"An introduction to R", which comes with R) and then maybe move to
Venables &
Ripley's "S Programming".


Hope this helps,

Ram?n


On Monday 07 April 2003 14:40, Samuel Plessis-Fraissard
wrote:
> I'am a very fresh R user and I'd like to know how I could create
such
> structures.
>
> I saw R was objects-oriented but I can not find any doccumentation on
> about how to build my hown ojects.
>
> Thanks.
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
-- 
Ram?n D?az-Uriarte
Bioinformatics Unit
Centro Nacional de Investigaciones Oncol?gicas (CNIO)
(Spanish National Cancer Center)
Melchor Fern?ndez Almagro, 3
28029 Madrid (Spain)
Fax: +-34-91-224-6972
Phone: +-34-91-224-6900

http://bioinfo.cnio.es/~rdiaz

On 7 Apr 2003, Samuel Plessis-Fraissard wrote:
> I'am a very fresh R user and I'd like to know how I could create
such
> structures.
>
> I saw R was objects-oriented but I can not find any doccumentation on
> about how to build my hown ojects.
>
You can build arbitrarily complex structures using lists (and lists of
lists, and...).

This isn't what people mean when they describe R as object-oriented,
though.

There are two systems for handling generic and method functions, so you
can say
    print(x)
or
    plot(x)

and the appropriate function for printing or plotting an `x' will be
called.

While there is some documentation (see ?class, ?UseMethod, and help for
the `methods' package) and there are quite a lot of examples in R itself
and in the Bioconductor project you probably want to read a book on S
programming.

	-thomas