[R] Question:manipulating spatial data using combination of Maptools and Splancs

[kostas karis]

Thank you for your advice but i still have a problem...Everything goes fine 
till the plotting (as usual).When i try the code you posted for the 
conversion i get the following message:

Error in coordinates(quakes) : no direct or inherited method for function 
'coordinates' for this call

i don't have a clue what this means...

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