R help - Dec 2008 - Spatstat - K2 index

Hi all,

I'm using spatstat to investigate the spatial structure of an arid shrub
population.  The first-order intensity of my data does not appear to be
homogenous, so I would like to use inhomogeneous techniques.  I realise
there is a inhomogeneous K-function available in spatstat, but there
doesn't not appear to be one for the pair-correlation function (O-ring
statistic).  As such I was planning to use a new technique (the K2
index) as described in Schiffers et al. (2008) [Ecography, 31:545-555].
The following website has more detail
[http://www.oikos.ekol.lu.se/appendixdown/E5374-example.R].  Despite
this I cannot get the function to run!  I am not very familiar with R so
it is likely my problem is simple.  Does anyone have any experience with
the K2-index who can give me some pointers?

Many thanks

Lauren 

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On 2/12/2008, at 4:30 AM, Gough Lauren wrote:
> Hi all,
>
> I'm using spatstat to investigate the spatial structure of an arid  
> shrub
> population.  The first-order intensity of my data does not appear  
> to be
> homogenous, so I would like to use inhomogeneous techniques.  I  
> realise
> there is a inhomogeneous K-function available in spatstat, but there
> doesn't not appear to be one for the pair-correlation function (O-ring
> statistic).  As such I was planning to use a new technique (the K2
> index) as described in Schiffers et al. (2008) [Ecography,  
> 31:545-555].
> The following website has more detail
> [http://www.oikos.ekol.lu.se/appendixdown/E5374-example.R].  Despite
> this I cannot get the function to run!  I am not very familiar with  
> R so
> it is likely my problem is simple.  Does anyone have any experience  
> with
> the K2-index who can give me some pointers?
In the first instance questions about a contributed package should be  
directed
to the maintainer(s) of that package.

It is not clear to me what your question is.  Can't get ***what***  
function
to run?  The file E5374-example.R sources ``Funktionen/K2.R'' to provide
the function K2, which is called upon later in this script.  Have you  
obtained
the file K2.R?  If not, that is your first problem.

	cheers,

		Rolf Turner

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