[ http://issues.apache.org/jira/browse/MATH-151?page=all ] Phil Steitz resolved MATH-151: ------------------------------
Resolution: Fixed Patch applied. Thanks! I understand that the patch is not really satisfying, but it makes the code better and resolves the reported problem. A more elegant solution may be possible, but the patch improves the code and resolves the reported problem, so it should be applied. If we find a better way to handle correct rounding of "bad" IEEE754 numbers, we can reopen or create a separate issue. Thanks for the patch! > MathUtils.round incorrect result > -------------------------------- > > Key: MATH-151 > URL: http://issues.apache.org/jira/browse/MATH-151 > Project: Commons Math > Type: Bug > Versions: 1.1 Final > Environment: Win2K, Sun JDK1.5.0_05 b05 > Reporter: Buza Zoltán > Attachments: math-151.patch > > MathUtils.round(39.245, 2) results 39.24, however it should be 39.25, with > default rounding mode BigDecimal.ROUND_HALF_UP. > I found that internally MathUtils.round multiplies the given number by > 10^scale. > 39.245 * 100.0 results 3924.49999...5 , and after this the calculation is > not correct any more. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]