[R] density plot - beginner's question

[Saurav Pathak]

Thanks to all who have provided me with valuable suggestions.  I am
forging ahead now, and am beginning to enjoy R.   

Thanks,
Saurav


Thus spake Saurav Pathak:

+  Hi,
+  
+  I am trying to plot densities given on a two dimensional grid.  My
+  data is in the an external file, and is arranged in three columns:
+  x, y, density
+  
+  how may i get a plot of this?  i would like to get (1) a three
+  dimensional plot and (2) a color coded two dimensional plot.
+  
+  I have tried using 
+  
+  	image(x, y, density)
+  
+  but i am asked to put the data in ascending order.  i am not sure
+  how i may put grid points in an ascending order.
+  
+  I would also like to know if i could use any other function, other
+  than image.
+  
+  thank you in advance.
+  
+  -- 
+  saurav
+  
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