[R] Help about R

[Philippe]

Hello,
My name is Philippe Favrot, I'm a french occupational doctor (working in 
Luxembourg), and I'm an "R beginner".
I would be happy you could help me about the utilization of "R".
Recently, I measured sound levels in a plant. Before the measuring, I 
divided the plant in 3 virtual rows and 8 virtual columns. I measured 
the sound level at each intersection of rows and columns and obtained a 
set of 24 "sound level" values.
I wrote the results in a excel's spreadsheet.
My question is: I know to do import from excel into "R" (with 
read.table()), but how can I draw a three dimensional graphic of the 
plant's sound level ? Can I overlay a map of this factory (as a 
rectangle with a grid representing each spots where I measured )?
I'd understand if you are too busy to reply to my mail.
Thanks.
Best regards
Philippe Favrot