Latest releases of math_stats

Math_Stats 0.9.1

2010年10月04日T13:11:33-05:00

QA release
Bug #17924 frequency and test suite broken

Math_Stats 0.9.0

2010年10月02日T18:01:04-05:00

QA release
Updated svn structure
Unit tests updated to phpunit 3.4
Bug #3315 frequency() generates notices
Bug #6252 Calculation of frequency gives an E_NOTICE
Bug #12465 Median formula incorrect

Math_Stats 0.9.0beta3

2003年06月12日T11:46:00-05:00

Modified the productN() method to try and avoid numeric overflow, and in case
there is overflow to return an array of values to be multiplied, instead of
a single resulting value.

Changed also the geometricMean() method to work with the new productN() and
product() methods. Unit tests have been unaffected by the change.

Math_Stats 0.9.0beta2

2003年06月04日T22:22:00-05:00

This is a bug fix release. Fixes (finally) an old bug in calculation of the
median. Users of any previous version are recommended to upgrade.

When I fixed a previous bug in the calculation of the median, I forgot to apply
the full fix, so it was calculating an erroneous value for data sets with an
odd number of entries.

Thanks to Diego Puga for pointing this out. It is good to get bug reports
when one is getting old and forgetful. ;-)

Math_Stats 0.9.0beta1

2003年06月03日T02:03:00-05:00

This is a beta release that containes new not thoroughly tested methods and
algorithms.

Many changes in the existing methods, and a number of new ones:

- Added better error handling.
- Refactored existing methods to delegate calculations better
- Added value caching for invariant statistical parameters
- Added optional parameters to some existing methods to enhance their
processing or output. Preserve the original behaviour as default so
as not breack backwards compatibility
- Added new methods:
- center()
- studentize()
- range()
- geometricMean()
- harmonicMean()
- product()
- productN()
- percentile()
- quartiles()
- interquartileMean()
- interquartileRange()
- quartileDeviation()
- quartileVariationCoefficient()
- quartileSkewnessCoefficient()
- Added a unit test class based on PEAR::PHPUnit

Math_Stats 0.8.5

2003年05月27日T23:35:00-05:00

Added methods sampleCentralMoment() and sampleRawMoment() to
calculate the corresponding nth moments of the data set.
Explicit casting of parameters passed to pow() to
circumvent the warnings/errors given by some versions
of the PHP interpreter. Thanks to Stephen Evans for
pointing this problem out.

Math_Stats 0.8.4

2003年05月16日T22:17:00-05:00

Fixed problem in element selection for the calculation
of the median. Thanks to Jeff Hoover for finding this bug.

Math_Stats 0.8.3

2002年05月24日T00:22:00-05:00

Another bug fix release. Version 0.8.2 was not released due
to wrong tags and bugs.

Math_Stats 0.8.1

2002年05月24日T00:14:00-05:00

Bug fix in __sumdiff() and in __sumabsdev(), which made
the variance, standard deviation, etc. be calculated incorrectly.

Math_Stats 0.8.0

2002年05月16日T04:54:00-05:00

Initial release under PEAR