[R] density plot - beginner's question

[Petr Pikal]

Hallo

On 13 Jan 2003 at 18:22, Saurav Pathak wrote:

> 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 
> 

try to use
library(akima)
ddd<interp(x,y,density,duplicate="median")
image(ddd)
or
persp(ddd)

>  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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Hope it helps

Cheers
Petr
petr.pikal at precheza.cz
p.pik at volny.cz