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Mantis - ALGLIB
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| ID: | Category: | Severity: | Reproducibility: | Date Submitted: | Last Update: |
| 454 | Spec.functions | major | always | 2012-05-08 20:43 | 2012-06-29 10:33 |
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| Reporter: | exp_1 | Platform: | |||
| Assigned To: | SergeyB | OS: | |||
| Priority: | normal | OS Version: | |||
| Status: | resolved | Product Version: | |||
| Product Build: | Resolution: | fixed | |||
| Projection: | none | ||||
| ETA: | none | Fixed in Version: | 3.6.0 | ||
| Programming language: | All | ||||
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| Summary: | 0000454: FIXED: big in the ErrorFunction() (about 1E-10 in magnitude) | ||||
| Description: |
Erf function returns incorrect results. Error is about 1e-10. Sing is lost in constant 0.288805137207594084924010. Must be -0.288805137207594084924010. For example, in Delphi file normaldistr.pas Wrong code: P := 0.288805137207594084924010+XSq*P; Correct code: P := -0.288805137207594084924010+XSq*P; Files affected: cpp\src\specialfunctions.cpp csharp\src\specialfunctions.cs ipython\csharp-src\specialfunctions.cs vbnet\csharp-src\specialfunctions.cs cpython\core\src\normaldistr.c vb6\src\normaldistr.bas freepascal\src\normaldistr.pas delphi\src\normaldistr.pas |
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| Steps To Reproduce: | |||||
| Additional Information: |
Proof: See: http://www.wolframalpha.com/input/?i=erf%284%2F10%29 Now erf(0.4) =0.42839235536425169 Must be 0.4283923550466684551036038453201724441218629285225903... Correcting =0.42839235504666845 |
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| Issue History | |||||
| Date Modified | Username | Field | Change | ||
| 2012-05-08 20:43 | exp_1 | New Issue | |||
| 2012-05-08 20:43 | exp_1 | Programming language | => All | ||
| 2012-05-15 10:03 | SergeyB | Status | new => assigned | ||
| 2012-05-15 10:03 | SergeyB | Assigned To | => SergeyB | ||
| 2012-05-15 10:04 | SergeyB | Target Version | => 3.6.0 | ||
| 2012-06-29 10:33 | SergeyB | Status | assigned => resolved | ||
| 2012-06-29 10:33 | SergeyB | Fixed in Version | => 3.6.0 | ||
| 2012-06-29 10:33 | SergeyB | Resolution | open => fixed | ||
| 2012-06-29 10:33 | SergeyB | Summary | Erf function returns incorrect results. Error is about 1e-10. => FIXED: big in the ErrorFunction() (about 1E-10 in magnitude) | ||
| 2012-06-29 10:33 | SergeyB | Description Updated | |||
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