[R] List Structure and Acces to data

[MacQueen, Don]

What you are doing looks like it is probably more complicated than
necessary, but since I have no idea what structure you intend to create,
it is hard to say.

Here is a suggestion:

try this:

 str(my_echant_hist)

It will give you a summary of the structure of that object, which should
help you understand how to access its elements.

The expression
  my_echant_hist[[1]][[2]]
makes sense if my_enchant_hist is a list, and if its first element is also
a list. Then you're asking for the second element within the first element.

There is nothing in R syntax that I know of that gives meaning to any of
these
  my_echant_hist[[]]
  my_echant_hist[[:]]
  my_echant_hist[[;]]
so I don't know what you were trying to get.

I do suggest studying documentation for syntax related to using '['. Type
  ?'['
or
  help('[')

-Don

-- 
Don MacQueen

Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062





On 7/23/13 4:22 AM, "Eric TRAVAGLINI" <Eric.TRAVAGLINI at crealp.vs.ch> wrote:

>Hello,
> 
>I used some other langages as Matlab and i just began with R, and i need
>help with data structure.
> 
>Here is my code
> 
>"
>fct_echant_hist <- function ( my_echant, my_vitesse, my_hist, my_summary)
>{
>	  list (my_echant = my_echant,
>		my_vitesse = my_vitesse,
>		my_hist = my_hist,
>		my_summary = my_summary)}
> 
> 
>my_echant_hist <- replicate(dim(pas)[1], fct_echant_hist(0L,
>			   0L,
>			   matrix(nrow=length(my_breaks),ncol=1),
>			   matrix(nrow=6,ncol=1)),
>	   simplify=FALSE)
>" 
>Is it possible to acces to all data of my_vitesse ?
> 
> 
>to acces to the my_vitesse of the first record i write
>my_echant_hist[[1]][[2]]
> 
>I try something like that without succes :
>my_echant_hist[[]][[2]] or
>my_echant_hist[[:]][[2]] or
>my_echant_hist[[;]][[2]]
> 
> 
>Thanks a lot
> 
>Eric ./.
> 
>P:S Sorry for my English