[R] Coordinate systems for geostatistics in R

[imicola]

Hi,

I read somewhere that when carrying out geostatistical analysis in R you
should not use latitude and longitude...can anyone expand on this a little
for me, and what would be the best coordinate system to use?

I have my data in a geographic coordinate system, WGS84, decimal
degrees....is this the wrong format for such analyses?

I have also converted my data in the UTM projection and so have it in
metres....(ranging from 480,000 to 550,000 E and 170,000 to 230,000 N).  

If I was to use the UTM coordinates, should I be using the actual
coordinates in metres, or should I convert this into an arbitrary coordinate
system (i.e. from 0 - 1) somehow?  

I have noticed that running an analysis on the data gives different results
depending on which type of system you use, so I want to make sure I have the
correct system.  I should also probably note that I am a geostatistical
novice!

Thanks,
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