[R] how to generate 2 dimensional mesh and hyper-cubes ?

[PO SU]

Dear expeRts,
    i want to know how to generate the 2 dimensional mesh (i.e. grid on the torus) of size n, The grid mesh (with wrap around of boundaries into a torus to avoid edge-effects). and the hyper-cube which is the log2(n)-dimensional grid of size n.    Does anyone happen to know it? BTW, how to find "spargraphs" this package, i find almost everywhere i know but still can not find it in R, is it a matlab package or other language package? Tks!


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PO SU
mail: desolator88 at 163.com 
Majored in Statistics from SJTU