Steema Issues Database

Note: This database is for bugs and wishes only. For technical support help, if you are a customer please visit our online forums;
otherwise you can use StackOverflow.
Before using this bug-tracker we recommend a look at this document, Steema Bug Fixing Policy.



Bug 168 - [TV52014068] Client Said : If I have a lot of big values and will calculate the s...
Summary: [TV52014068] Client Said : If I have a lot of big values and will calculate ...
Status: CONFIRMED
Alias: None
Product: VCL TeeChart
Classification: Unclassified
Component: Other Components (show other bugs)
Version: unspecified
Hardware: All All
: Normal major
Target Milestone: ---
Assignee: Steema Issue Manager
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2009-04-07 14:51 EDT by sandra pazos
Modified: 2013-11-20 10:01 EST (History)
0 users

See Also:
Chart Series: ---
Delphi / C++ Builder RAD IDE Version:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description sandra pazos 2013-11-20 10:01:27 EST 
Client Said : If I have a lot of big values and will calculate the standard deviation the function will result in wrong values. I think the function have an overflow, in that case it would be nice if the value is set to double.nan or something so that i can recalculate it or change the source. Is the same problem with TeeChart .NET.
Check next example for reproduce the bug:
procedure TForm1.FillCreate;
var tmp : Double;
 t:Integer;
begin
 tmp:= RandomRange(-2000000000, 2000000000);
for t:=0 to 400000 do
 begin
 Series1.AddXY(t,tmp);
 tmp:= RandomRange(-2000000000, 2000000000);
end;
Series2.CheckDataSource;
end; [created:2009-04-07T13:51:10.000+01:00 reported by:sandra@steema.com reported in version:8.04 (TeeChart VCL)]