I usually generate the numbers myself without using the ATP histogram.

http://peltiertech.com/Excel/Charts/Histograms.html

- Jon
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Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
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"jmease" wrote in message
...
Whenever I create a histogram in Excel the frequencies generated are
incorrect and I have to manually count and update in order to reflect
accurate information. Any ideas on why this is happening or how to fix
it?