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From "Cheng (JIRA)" <j...@apache.org>
Subject [jira] Created: (CHUKWA-69) Calculate trapezoid area for a given series of data
Date Tue, 31 Mar 2009 20:16:50 GMT
Calculate trapezoid area for a given series of data
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                 Key: CHUKWA-69
                 URL: https://issues.apache.org/jira/browse/CHUKWA-69
             Project: Hadoop Chukwa
          Issue Type: Task
          Components: User Interface
            Reporter: Cheng
            Priority: Minor


Calculate trapezoid area for a given series of data.

suppose we have:

  x0, x1, x2, x3 
  y0, y1, y2, y3

the area would be 

   (x1-x0) * (y1+y0)/2 + (x2-x1) * (y2+y1)/2 + (x3-x2) * (y3+y2)/2

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