R help - May 2007 - H-scatter plot in geostatistics

Hello: 

I would like to make h-scatter plot.
My data looks like as follow:
x, y, z,
12.0, 11.2, 12,
10.21, 5.42, 8,
5.12, -8.25, 7,
.... 


I want to make h-scatter plot for the z values by difference distance h from 
1 to 20. There are 1023 observations. 

Do I need to change data class from data-frame to others? 

I am not sure we can make h-scatter plot in R. 

Have a nice day. 


HongSU.