0000524: FIZED: possible division by zero in estimator for errors-in-parameters - Mantis

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ID

Category

Severity

Reproducibility

Date Submitted

Last Update

0000524

[ALGLIB] Interpolation

minor

have not tried

2013-05-28 11:57

2013-06-07 12:06

Reporter

SergeyB

View Status

public

Assigned To

SergeyB

Priority

normal

Resolution

fixed

Platform

Status

resolved

OS

Projection

none

OS Version

ETA

none

Fixed in Version

3.8.0

Product Version

Target Version

3.8.0

Product Build

Summary

0000524: FIZED: possible division by zero in estimator for errors-in-parameters

Description

When Total Sum-of-Squares (TSS) is zero, it is impossible to calculate R2 (coefficient of determination). Past versions of ALGLIB returned NAN in this case (internally they performed division 0/0).

After the fix, ALGLIB monitors TSS and returns R2=1.0 when TSS is zero.

Steps To Reproduce

Additional Information

Programming language

Unspecified

Relationships

There are no notes attached to this issue.

Issue History
Date Modified	Username	Field	Change
2013-05-28 11:57	SergeyB	New Issue
2013-05-28 11:57	SergeyB	Status	new => assigned
2013-05-28 11:57	SergeyB	Assigned To	=> SergeyB
2013-05-28 11:57	SergeyB	Programming language	=> Unspecified
2013-06-05 11:55	SergeyB	Target Version	Next release => 3.8.0
2013-06-07 12:06	SergeyB	Summary	Possible division by zero in estimator for errors-in-parameters => FIZED: possible division by zero in estimator for errors-in-parameters
2013-06-07 12:06	SergeyB	Description Updated
2013-06-07 12:06	SergeyB	Status	assigned => resolved
2013-06-07 12:06	SergeyB	Fixed in Version	=> 3.8.0
2013-06-07 12:06	SergeyB	Resolution	open => fixed

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