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Bug 366787

Summary:

Standard deviation returns 'NaN' when equal values are given

Product:

z_Archived

Reporter:

Tim Winselmann <tim.winselmann>

Component:

BIRT

Assignee:

Birt-Data-inbox <Birt-Data-inbox>

Status:

NEW ---

QA Contact:

Hao Zhou <hao.zhou>

Severity:

normal

Priority:

CC:

bluesoldier, tim.winselmann

Version:

2.6.2

Target Milestone:

---

Hardware:

All

OS:

All

Whiteboard:

Attachments:

Description	Flags
A report with a standard deviation	none

Description Tim Winselmann

2011-12-15 03:59:16 EST

Created attachment 208424 [details]
A report with a standard deviation

I was trying to calculate the standard deviation of three equal values (like 25.63, 25.63, 25.63) within the Aggregation Builder via Function STDDEV. The returned value is 'NaN' and not the correct value "0".

I have attached a report that shows the reported behavior.