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I need to get the average of the 3 highest frequencies in a table and append it to a shape file i already have

hope you can help me

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may be report tool will be helpful for you.. – Sunil Mar 14 '13 at 5:02
Can you provide some more details of what you are wanting to do, please? Perhaps post some diagrams of your input and desired output. – PolyGeo Mar 14 '13 at 10:49

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