[R] create and save a simulated dataset

Bert Gunter gunter.berton at gene.com
Sat Feb 2 22:22:05 CET 2013

Is this a homework problem? (We don't do homework here).

What is missing from your query is any specification of what you mean
by "random," which, by itself, is meaningless. It also might be the
case that the trees within each stand are correlated in some way --
perhaps they should to be more similar in diameter within a stand than
between.  So I think your first task is to think more carefully about
**what** you want to do and how to specify it precisely and completely
before worrying about  **how** to do it..


On Sat, Feb 2, 2013 at 12:10 PM, Giovanna Ottaviani
<GIO at skogoglandskap.no> wrote:
> Hello,
> I am trying to learn how to create a simulated dataset of a forest stand:
> I must simulate 10 stands, for each of the stands I have been creating a random number of trees. For each tree I should create a random diameter.
> The problem I have is that I cannot use a matrix because the length of the three items is different. I was trying with list but I have no clue on how to make a dataset out of them... tried "merge"....
> Anyone has some clever suggestion?
> THANK you !!
> Giovanna
> Giovanna Ottaviani Aalmo
> Stipendiat/Ph.D. Student
> -------------------------------------------
> Norsk institutt for skog og landskap
> Pb 115, NO-1431 Ås
> T (+47) 64 94 9094
> M(+47) 980 30 422
> F(+47) 64 94 90 80
> -------------------------------------------
> www.skogoglandskap.no<http://www.skogoglandskap.no/>
> -------------------------------------------
>         [[alternative HTML version deleted]]
> ______________________________________________
> R-help at r-project.org 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.


Bert Gunter
Genentech Nonclinical Biostatistics

Internal Contact Info:
Phone: 467-7374

More information about the R-help mailing list