Oracle data mining - O-cluster

Hi,
I've implemented O-cluster algorithm and during doing some tests I've noticed strange results. I hope that someone had something to do with this alghoritm and is able to answer for my questions : 1. O-cluster uses data histograms. Are the bins' values computed in usual way for histograms :
number of points in bin range/(number of all points*bin width) 2. Is the equation for chi-square test correct ??  2*((observed-expected)^2)/expected, where  observed is the value of histogram valley and expected is the average of the histogram counts of the valley and the lower peak. 3. I compute bin width as 3.49*standard_deviation*number of points^(-1/3)

My problem is that I've never reached min statistical significance(3.843) for none of my data sets.It is possible that i have wrong data (maybe too small for o-cluster, too few dimensions) but some other clustering alghoritms were able to obtain some clusters from my data sets.

Thank you very much for any clues, ideas and places where i can find some additional help.
Szalas Received on Mon Jan 12 2004 - 12:34:07 CST