[R] density plot - beginner's question
Petr Pikal
petr.pikal at precheza.cz
Tue Jan 14 10:01:03 CET 2003
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
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