Re: [R] about"Riply's K function"and "envelope"

From: zhang jian <jzhang1982_at_gmail.com>
Date: Tue 28 Feb 2006 - 07:26:16 EST

I have tried the package"spatial" and "splance".But it is not good. I think there are some questions when I run the programs. I attach a part of data. can you help me try to do it? And attach a simple program to me.
my plot is square, 500m*500m.
> PIKO[1:10,]

     code species  dbh     x     y   tag status branch
92  10142    PIKO 38.9  6.05 12.81 10165  alive      0
109 10213    PIKO 41.0  6.71 26.21 10202  alive      0
135 10222    PIKO 48.3 18.98 21.28 10214  alive      0
146 10223    PIKO 47.0 19.45 22.83 10224  alive      0
147 10223    PIKO 20.0 19.74 28.65 10225  alive      0
151 10223    PIKO 23.3 17.03 28.88 10229  alive      0
152 10223    PIKO 33.5 16.94 27.25 10230  alive      0
176 10232    PIKO 43.5 19.20 30.88 10248  alive      0
181 10233    PIKO 39.0 18.10 35.60 10252  alive      0
212 10243    PIKO 71.2  6.94 37.27 10281  alive      0

"x,y" are coordinations. I want to use them to do Ripley's K analysis. thank you very much!
Help me!

                                          jian zhang

On 2/27/06, Sundar Dorai-Raj <sundar.dorai-raj@pdf.com> wrote:
>
>
>
> zhang jian wrote:
> > hi!
> > I did Riply's K function and envelope in the package "SPATSTAT". When
> the
> > species number is less, it can work well and it is quickly. But when the
> > species number is more(example:2000), it told me"memory limit". So I
> change
> > "memory limit". But the speed is very slow. I took 13 hours to run the
> > programe.
> > Perhaps there are other methods that can do it. Or just change some
> > parsmeters.
> > who can help me?
> > Thank you!
> > Jian
> Zhang
> >
>
> I don't have an example, but have you looked at ?Kenvl in the spatial
> package?
>
> HTH,
>
> --sundar
>

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