Revision history for Perl extension Statistics::ANOVA.

0.07 2010/10/03 ** Important: Several changes that make this version incompatible with v0.062: 

         -new: generic anova() and compare() methods
        -new: independent groups non-parametric method (Kruskal-Wallis), handling ties
        -new: independent "levels" test, of linearity, by parametric and non-parametric (Jonckheere-Terpstra) methods
        -new: dependent "levels" test, of linearity, by non-parametric method (Page test)
        -new: post hoc cluster method, parametric (Scott-Knott) and non-parametric (Worsley)
        -new: nonparametric multiple comparison procedure for nominal independent groups (Dwass procedure)
        -new: options/method for setting alpha and correcting p-value in the means-comparisons procedures. So alpha is .05 by default, but can be set to something else, and instead of the alpha being adjusted according to the number of means compared, the p-values themselves can be adjusted.
        -change: extended correction for ties in Friedman's test per Hollander-Wolfe eq. 7.8
        -change: multiple comparisons now return a hash of relevant values, rather than simply dump to STDOUT; see method compare()
        -change: load() and add() methods now also accept arefs of "name, data" pairs, or a single aref, with the "data" being arefs or not
        -change: unload() method can now be sent one or more names for clobbering particular samples, rather than bombing the lot
        -change: a comma was missing between t_value and p_value in dump of independent comparisons
        -change: no more of these dashes in the dumps: 2-p, 1-p; just 2p and 1p instead
        -change: precisioning handles undefined values
        -change: alphanum order of the pairs in paired comparisons
        -change: clean-up of refs in pod
    -change: the hash keys that were suffixed with "t" and "e" (for "treatment" and "error") are now suffixed with "b" (for "between") and "w_ (for "within").
        -misc: plenty new tests in "t" folder

0.06x 2008/07/11 - 2009/03/13

-further work on appropriate handling of missing values and NaNs. -generalised grand_total calculation within anova_indep which was appropriate only if equal number of observations per group: thanks to Cathal Seoghie for feedback that led to identifying this limitation -handling "missing values": added checking and purging of elements that are undefined or NaN before loading; this also reduces the later checks and possible croaks -added sub "table" for returning/printing a table of dfs, sums-squares, etc.; pretty formatting still needed ...

0.02-0.05 2008/06/26:

-added sub "add_data" for non-deleting loads; all calls to load unload -all carps now croak
-nonparam flag for ensuring Friedman test appropriately "dump"-ed -cleaned-up ranking operation in Friedman test to handle ties - thanks to Gene Boggs' Statistics-RankCorrelation -added F-equivalent output option for Friedman test - thanks to "R" docs -cleaned-up POD and dist, with example file -removed bung sub fmax for now

0.01 Tue Jun 27 02:19:29 2006