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Building Histogram for lognormal data

Rich Talbot
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Product: TIBCO Spotfire®

Problem:

Building Histogram for lognormal data


Solution:

How to build a histogram for lognormal data?
  To create a histogram, bin the category axis of a Bar Chart whose value axis is (Row Count). The following is an example of a custom expression that will do this when the category axis is defined using a numeric column.

     AutoBinNumeric([Mileage],12)

To log-transform the category axis of the histogram, right-click on its category axis, then select "Log Scale" from the context-sensitive menu.
 

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