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Focal Point    Focal Point Forums  Hop To Forum Categories  WebFOCUS/FOCUS Forum on Focal Point     [Solved] Calculation Error

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[Solved] Calculation Error
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posted
Can anyone explain why my calculation for "PTM_NOT_SHIPPED_IMAGES" is wrong? It's calculating a value of 1,273,022, but it should be 1,273,333 (276,211 * 4.61).

  
-SET &Processed_Images = '2232254';
-SET &Processed_Stmts = '484338';
-SET &PTM_Stmts = '208127';

TABLE FILE CAR
SUM CAR NOPRINT
	COMPUTE IMGS_PER_STMT/D3.2 = &Processed_Images / &Processed_Stmts; AS 'Images per Statement' 
	COMPUTE PTM_NOT_SHIPPED/D12 = &Processed_Stmts - &PTM_Stmts; AS 'Statements Not Shipped'
	COMPUTE PTM_NOT_SHIPPED_IMAGES/D12 = PTM_NOT_SHIPPED * IMGS_PER_STMT; AS 'Images Not Shipped'
END

This message has been edited. Last edited by: Joel Elscott,


WebFOCUS 8.2.03
z/OS
 
Posts: 66 | Registered: May 20, 2013Report This Post
Expert
posted Hide Post
Change D3.2 to D5.2...

 
Images per Statement Statements Not Shipped Images Not Shipped 
                4.61    276,211                      1,273,022 



Tom Flynn
WebFOCUS 8.1.05 - PROD/QA
DB2 - AS400 - Mainframe
 
Posts: 1972 | Location: Centennial, CO | Registered: January 31, 2006Report This Post
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posted Hide Post
I tried D5.2 and D3.2 but get same result of 1,273,022.

4.61 * 276,211 should equal 1,273,333.


WebFOCUS 8.2.03
z/OS
 
Posts: 66 | Registered: May 20, 2013Report This Post
Virtuoso
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Try /P format instead of /D such as /P3.2
Change them all to /P


WF versions : Prod 8.2.04M gen 33, Dev 8.2.04M gen 33, OS : Windows, DB : MSSQL, Outputs : HTML, Excel, PDF
In Focus since 2007
 
Posts: 2409 | Location: Montreal Area, Qc, CA | Registered: September 25, 2013Report This Post
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That worked! Thank you!

Dare I ask why Packed vs. Decimal would make a difference?


WebFOCUS 8.2.03
z/OS
 
Posts: 66 | Registered: May 20, 2013Report This Post
Expert
posted Hide Post
Hi Joel,

It's the way that the data is held.

Packed decimal format will only store the decimal component to the number of decimal places given within the format (in your case, 2 decimal places) rounding as per rules.

Double Precision format (not decimal) will hold the result at more decimal places than given in the format - which is essentially a "usage" format in this instance.

So, with double precision, your calculation is using 4.60887644579 etc. and not 4.61 which is what packed decimal format provides.

T



In FOCUS
since 1986
WebFOCUS Server 8.2.01M, thru 8.2.07 on Windows Svr 2008 R2  
WebFOCUS App Studio 8.2.06 standalone on Windows 10 
 
Posts: 5694 | Location: United Kingdom | Registered: April 08, 2004Report This Post
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Thank you Tony, I appreciate your detailed explanation!


WebFOCUS 8.2.03
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Posts: 66 | Registered: May 20, 2013Report This Post
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