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Classes to calculate statistical parameters

This package is unmaintained.

Download latest release 0.9.1 (archived versions might be outdated)

License: PHP

Description

Package to calculate statistical parameters of numerical arrays
of data. The data can be in a simple numerical array, or in a
cummulative numerical array. A cummulative array, has the value
as the index and the number of repeats as the value for the
array item, e.g. $data = array(3=>4, 2.3=>5, 1.25=>6, 0.5=>3).
Nulls can be rejected, ignored or handled as zero values.

Maintainers

• Jesus M. Castagnetto (jmcastagnetto) — lead, active

Dependencies

Required

• PHP (>= 4.2)
• PEAR Installer (>= 1.4.0b1)

Releases

• 0.9.1 (beta, 2010-10-04)
  Release notes

  License: PHP

  QA release
  Bug #17924 frequency and test suite broken

• 0.9.0 (beta, 2010-10-02)
  Release notes

  License: PHP

  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

• 0.9.0beta3 (beta, 2003-06-12)
• 0.9.0beta2 (beta, 2003-06-04)
  Release notes

  License: PHP

  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. ;-)

• 0.9.0beta1 (beta, 2003-06-03)
  Release notes

  License: PHP

  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

• 0.8.5 (stable, 2003-05-27)
  Release notes

  License: PHP

  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.

• 0.8.4 (stable, 2003-05-16)
  Release notes

  License: PHP

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

• 0.8.3 (beta, 2002-05-24)
  Release notes

  License: PHP

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

• 0.8.1 (beta, 2002-05-24)
  Release notes

  License: PHP

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

• 0.8.0 (beta, 2002-05-16)
  Release notes

  License: PHP

  Initial release

Bugs