[R] object gstat

[giuseppeform at libero.it]

dear all i have this dataset: x,y, datavalue 
> dati[,c(1,2,5)]
        [,1]  [,
2]  [,3]
  [1,] 2.386 3.077 1.740
  [2,] 2.544 1.972 1.335
  [3,] 2.807 3.347 
1.610
  [4,] 4.308 1.933 2.150
  [5,] 4.383 1.081 1.565
  [6,] 3.244 4.519 
1.145
  [7,] 3.925 3.785 0.894
  [8,] 2.116 3.498 0.525
  [9,] 1.842 0.989 
0.240
 [10,] 1.709 1.843 0.625
 [11,] 3.800 4.578 3.873
 [12,] 2.699 1.199 
1.425
 [13,] 3.033 4.384 0.455
 [14,] 4.232 1.588 1.025
 [15,] 4.750 1.369 
0.775
..........................................

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I want to create gstat object where 
x,y are location and datavalue are the misurement,.....thank