[R] Question on exercise

[Ben Bolker]

Jan Kraner <jan.kraner <at> gmx.ch> writes:

> 
> Dear Sir/Madam:
> 
> Could you please help me with this exercise and how I could solve it in R?:
> 
> Attachment (PastedGraphic-1.pdf): application/pdf, 84 KiB
> 
> I especially have problems with the selection of the 40 datasets, 
> once taken the 110 (because they have to be
> exactly the remaining ones).


  Sorry, but we don't do homework here.  (Furthermore, PDF is
not the most mailing-list-friendly form of attachment -- if you
do post to the list in the future, plain text is preferred ...)
You should try to get help on your homework locally, through
approved channels.

  Ben Bolker