Revision history for PDL-Stats

0.6.1   04/24/2012
        Bails out of installation if running under perl 5.15.0 to 5.15.8 but allows --force to attempt a build regardless.

0.6.0   04/08/2012
        Added group_by() method in Basic.pm.
        Updates pdl doc database.
        Bails out of installation if running under perl 5.14.0 to 5.15.8.
        Removed old deprecated method get_data() from Basic.pm
        Moved no slatec warning from module to test. Removed lvalue assignments from tests.

0.5.5   04/22/2011
        GLM Windows 32-bit test bug fix; GLM quits installation with PDL-2.4.7 warning. Documentation update.

0.5.4   04/19/2011
        GLM pca() and plot_scores() can do cov version.
        [rt.cpan.org #67557] Undo PREREQ_FATAL => 1 in Makefile.PL.

0.5.3   04/18/2011
        stats_glm.t pca() test SLATEC vs. MatrixOps precision fix.

0.5.2   04/17/2011
        stats_glm.t pca() test precision fix.

0.5.1   04/16/2011
        ***GLM pca() return value names updated*** to be more compatible with the literature.
        GLM added plot_scores(); plot_scree() name changed to plot_screes() for consistency across plotting functions.
        Updated plotting functions to default to png in Windows because GW doesn't reopen after close.

0.5.0	04/02/2011
		Updated tests to use __DATA__ instead of separate test data files.
		GLM added interaction_code(); bug fix for dummy_code().
		GLM added ols_rptd()!
        GLM added plot_residual().
		GLM eval wrapped optional modules; replaced perl reverse sort with slice (-1:0).
        Basic added binomial_test().
        TS updated plot_season() to season_m(); deprecated a few old function names, filt_exp(), filt_ma(), and dsea().

0.4.3	04/08/2010
		Distr::plot_distr() bug fix.
		Kmeans::kmeans() pod update.

0.4.2	03/27/2010
		rtable() added to PDL::Basic. get_data() deprecated. Preparing for transitioning to using rcols() for IO.
		perldl online help support! (ie "? stdv" in perldl works)

0.4.1	02/02/2010
		GLM anova anova_rptd IVNM default val matched to [].
		Makefile.PL exit 0 without PDL::Lite.
		TS added wmape
		pod fix for CPAN

0.4.0	01/24/2010
		GLM anova_rptd supports between subject factors! We are now beta!

0.3.2	01/08/2010
		Kmeans kmeans CNTRD checks undef besides PDL->null. opt{V} printout update
		Kmeans added which_cluster
		Kmeans pca_cluster does scree plot with cutoff line
		GLM logistic pod update
		GLM anova anova_rptd pca plot_scree plotting options update

0.3.1	12/16/2009
		Removed pms--relying on pdl-stats.sourceforge.net for web documentation instead of CPAN. Minor pod update.
		GLM::ols_t removed $y->squeeze, so that edge case like ols_t on 1 obs threads properly (y[1,10]->ols_t(x[1,10]->dummy(1), {const=>0}) gives b[1,10]).
		GLM::anova_rptd se fix.
		GLM::anova and anova_rptd plot se fix.
	    PDL::Stats::TS included. ***alpha alpha*** code! Included because I'm tired of maintaining it separately from PDL::Stats.

0.3.0	12/03/2009
        GLM::anova_rptd! works for purely within designs
        GLM::anova bug fix--not messing up caller @ if passed @ ref in IV instead of pdl
	    Change prereq from PDL to PDL::Lite
	    Stats.pm quick-start guide update
	    t/stats_glm logistic test modified to use more proper numbers in x

0.2.8	11/04/2009
	    Fixed minor bug (mismatched nseed and self cluster pdls. oops) in switching to use cluster assignment as stop criteria. btw initial R2 now based on self instead of seeds.

0.2.7	11/04/2009
        GLM::plot_scree allows directly passing NCOMP. plots cutoff line for screes if requested
        kmeans stops when cluster assignment no longer changes instead of using R2CRT.
        If not specified, Kmeans::pca_cluster studies scree plot to determine NCOMP
	    Basic::get_data STDERR message fix: data pdl o x v, NOT v x o

0.2.6	10/12/2009
        anova bad value se bug fix
        centroid bad value empty cluser bug fix
        basic, glm, distr rid of nan and use bad value instead

0.2.5   09/17/2009
        PREREQ_FATAL => 1 in Makefile.PL
        added pca_cluster in Kmeans.
        anova one-way bug fix.
        plot_means one-way bug fix.

0.2.4   09/02/2009
        added corr_table in PDL::Stats::Basic.
        PDL::Stats::GLM::pca uses corr_table.
        kmeans no longer quits with empty cluster. kmeans 3d threading bug fix.
        use short-circuit ISBAD(a) || ISBAD(b) instead of ISGOOD(a) && ISGOOD(b) in bad value processing.

0.2.3   08/24/2009
        ***anova interface change*** IV names now passed in \%opt instead of @ ref. I appologize for the interface change, but it matches the new method plot_means, and makes it easier to pass IVs themselves. I promise that such interface changes will be extremely rare, if at all.
        anova now supports bad value in DV.
        Added plot_means in PDL::Stats::GLM. anova plots highest order interaction by default.
        Added plot_scree in PDL::Stats::GLM. pca does scree plot by default.
        Added pca_sorti in PDL::Stats::GLM.
        plot_distr in PDL::Stats::Distr accepts WIN option
        Set prerequisite PDL => 2.4.4, which has bad value support by default

0.2.2   07/23/2009
        stats_distr.t moved form t/ to Distr/t, ie skip the test if no GSL.
        more kmeans fix (4d, seeding). added seeded kmeans tests.

0.2.1   07/22/2009
        kmeans 4d fix. added pms dir for cpan pod parse

0.2.0   07/21/2009
        kmeans threads! ss/ms bug fix. more tests on kmeans added.

0.1.3   07/17/2009
        quick-start for non-PDL people in Stats.pm pod
        ols_t uses double internally. GLM pod update
        r2_change threads (switched to use ols_t instead of ols)
        get_data which_id moved to Basic from GLM
        tests grouped in PDL-Stats/t except for PDL::GSL::CDF

0.1.2   07/15/2009
        Cleaned up some versioning stuff in Stats.pm
        GLM::get_data TYPE default to double. MISSN handling update; set to BAD by default.
        Case insensitive option passing.

0.1.1   07/14/2009
        Fixed PDL::Stats::GLM::ols b_p value for b_t < 0.

0.1.0   07/13/2009
        First version, released on an unsuspecting world.
