BUG in Ripleys K Function

RobertoFuentes — Sat, 18 Sep 2010 15:43:42 GMT

I have a point data set representing 'Plants' across a vast range. The point data set does not contain a boundary... its just a collection of points.

I would like to perform a Multi-distance Spatial Cluster Analysis (Ripleys K Function) on my data set.

I am Utilizing ArcMap10 on a Windows 7 machine.

Here are the parameter inputs:
featureclass_plants
output table
Number of distance bands: 10
Confidence Interval: 99_permuations
Display results checked
Weight Field: Blank
Beginning Distance: 0
Distance Increment: 2
Boundary Correction Method: Ripley_edge_correction_formula
Study Area Method: Minimum_enclosing_rectangle

The calculation FAILS. The error that it throws is:
<type 'exceptions.KeyError'>:28L

The problem is with the Boundary Correction method.
If I use NONE or SIMULATE OUTER BOUNDARY VALUES, the calculation works.
If I use RIPLEYS EDGE or REDUCE ANALYSIS AREA the calculation fails.

I am assuming it is a BUG in Arc10 because it works fine in 9.X.

Any suggestions??

Thanks

Re: BUG in Ripleys K Function

MarkJanikas — Tue, 21 Sep 2010 18:21:36 GMT

Hello wisfool,

I am the programmer for the tool and I would be glad to help you out. Would it be possible to send me your data? We have quite a few harness tests for "Ripley" and "Reduce" and we are not getting the error. If you cannot send me the data, then perhaps I could get in touch with you remotely to try and debug. You can reach me at my coords: mjanikas@esri.com

Thanks so much,

MJ

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BUG in Ripleys K Function

Re: BUG in Ripleys K Function