2023-09-03: Ver. 0.2-15
  * Remove the meta table from the doc.
  * Modify CITATION.

2022-08-12: Ver. 0.2-14
  * Use is() to replace class() inside if().
  * Fix LaTeX symble in man for KaTeX conversion.
  * Remove PPtree from enhance.

2021-11-06: Ver. 0.2-14
  * Add e-mail.

2021-03-08: Ver. 0.2-13
  * Add a calloc to "src/R_init_svd.c" to avoid errors detected by valgrind.
  * Change http to https.

2020-04-30: Ver. 0.2-13
  * Add a demo example that uses oversize k for semi-supervised clustering.
  * Add a restriction to init.EM() where sufficient unlabeled data should be
    checked for initializing oversize k.

2019-03-20: Ver. 0.2-12
  * Push some PROTECT and UNPROTECT back within the call.

2019-03-07: Ver. 0.2-11
  * Move PROTECT and UNPROTCT to the caller function.

2018-03-17: Ver. 0.2-11
  * Fix conv.iter and conv.eps for most C functions.

2018-03-11: Ver. 0.2-11
  * Return conv.iter and conv.eps for emcluster(), emgroup(), and their
    semi-supervise version if any.

2018-01-30: Ver. 0.2-10
  * Adjusting for CRAN requests.

2018-01-27: Ver. 0.2-10
  * Reordering LAPACK_LIBS, BLAS_LIBS, and FLIBS in "src/Makevars".

2018-01-14: Ver. 0.2-9
  * Replace recolor.r

2017-06-04: Ver. 0.2-8
  * Fix UNPROTECT problems. DO NOT add UNPROTECT(*) to
    EMCluster/src/it_R_emptr.c. It will be done outside of that call by the
    caller. It is only to allocated space which is pointed by a poninter!

2017-04-07: Ver. 0.2-7
  * Add UNPROTECT(8); to EMCluster/src/it_R_emptr.c.

2017-03-17: Ver. 0.2-7
  * Rename emobj$M to emobj$adjM.

2015-10-31: Ver. 0.2-6
  * Change recolor() and add rematch() and recode().
  * Change url address.

2015-10-19: Ver. 0.2-5
  * Fix an adjR seg. fault.
  * Add recolor().

2015-07-18: Ver. 0.2-5
  * Several changes.
  * Rename partial.logL() to partial.q() and change all other caller functions.
  * Add partial.logL().
  * Add logitPI = TRUE to partial.q() and partial.logL().
  * Normalize pi at the end of EM for functions returning emobj.
  * Add log = FALSE to dmixmvn().
  * Add Jaccard.Index().
  * Change man pages.
  * Change authorship.

2015-07-05: Ver. 0.2-5
  * Add logit post I information.

2015-03-07: Ver. 0.2-5
  * Fix typos and problems of new version of R.
  * Change lmt options.

2013-01-13: Ver. 0.2-5
  * Fix more lmt and ppcontour plotting bugs.

2013-01-03: Ver. 0.2-5
  * Add and test lmt and ppcontour.

2013-12-14: Ver. 0.2-4
  * Move vignettes.

2013-07-02: Ver. 0.2-4
  * Fix variance2LTSigma for 1 dimension case.

2013-01-30: Ver. 0.2-3
  * Fix man page authorship typos.
  * Fix uninitialed variables problem.

2012-12-23: Ver. 0.2-2
  * Fix .Last.load problem.

2012-12-06: Ver. 0.2-1
  * Fix authorship typos.

2012-12-05: Ver. 0.2-0
  * Add man, vignette, and all required files for CRAN.

======================= Log for C Code =====================================
* All Dr. Maitra's codes are kept in the original files and names.
* Some original functions are modified inside the original files
  with same function names.
* Some extra functions are extended and saved separately.
* All generic functions are stored in files with function's name and
  aheaded with "M_".
* All R call function are stored in files with function's name and
  aheaded with "R_".
* All semi-supervised clustering are stored in files with function's name and
  adheaded with "ss_".
* Header files "mb_tool.h" and "ss_mb_tool.h" collect major functions except
  files and functions aheaded with "R_".
* All functions with counting iterations and times in files with function's
  name and adheaded with "it_".

Modifiled: Wei-Chen Chen on 2009/04/27.


======================= Log Before Release =====================================
2010-05-07: Ver. 0.1-18
  * Add checks in decreasing logL.

2009-08-18: Ver. 0.1-17
  * Add adapted candidated initializations.

2009-06-17: Ver. 0.1-16
  * Rewrite EM step to ME step.

2009-06-09: Ver. 0.1-15
  * Add clock ticks.
  * Rewrite emobj in C structure.

2009-03-17: Ver. 0.1-14
  * Fix possible bugs in semi-supervise clustering methods.

2009-03-15: Ver. 0.1-13
  * Add all semi-supervise clustering methods.

2009-03-08: Ver. 0.1-12
  * Modify model-based randomEMinit() for original methods.

2009-02-16: Ver. 0.1-11
  * Add model-based initializer in C.
  * Add rand.EM and rand.em.EM methods.
  * Simplify model-based initializer in C and fix bugs.

2009-01-19: Ver. 0.1-10
  * Add shortemcluster().
  * RRand requires long integers for 64-bit machine.
  * Fix a convergence condition of shortemcluster() in C.
  * Modified estep() in C.
  * Add myiris data set with test and plot.md() in R.

2009-01-11: Ver. 0.1-9
  * Add controls for stable solutions in em.EM().

2008-12-03: Ver. 0.1-8
  * Fix a bug for likelihood calculations for 1 cluster.
  * Fix a bug for determine() using call by address that change the values
    of input parameters.
  * Fix more bugs in "src/initials.c" for MLE and MME of ltsigma.

2008-11-16: Ver. 0.1-7
  * Add sequential boosting methods.

2008-10-29: Ver. 0.1-6
  * Add logL(), dmixmvn(), dlmvn() in "R/" and "R_dlmvnorm.c" in "src/".
  * Add all functions with wt version to ignore transposing matrix.
  * Fix a bug in e.step() in "R/".
  * Add GetRNGstate() and PutRNGstate() in "src/srswor.c".
  * Add all test functions in "test/" to test wt and wot version.

2008-10-27: Ver. 0.1-5
  * Change estep() to e.step(), mstep to m.step() in "R/".
  * Create RRand() in "R/".

2008-10-20: Ver. 0.1-4
  * In "src/", add "R_estep.c", "R_mstep.c".
  * In "R/", add "fcn_estep.r", "fcn_mstep.r".
  * In "demo/" , add "testemstep.r".

2008-10-14: Ver. 0.1-3
  * In "src/", add "M_emgroup.c", "M_init_other.c", "R_M_emgroup.c",
    "R_M_init_other.c", "R_emcluster.c", and "R_initials.c".
  * In "R/", add "fcn_init_other.c", "fcn_initials.r", "fcn_plot2d.r",
    "fcn_summary.r", and modify all other files.
  * In "demo/", add "test_init.r".
  * In "data/", add "control.r", "da2.rda", and "da3.rda".

2008-10-06: Ver. 0.1-2
  * Add "src/R_tool.c".
  * Add "R_emgroup()" in "src/R_emgroup.c" to call "emgroup()"
    in "src/emgroup.c".
  * Add "R_starts_via_svd()" in "src/R_init_svd.c" to call
    "starts_via_svd()" in "src/init_svd.c".
  * Add "R/fcnmy.r".
  * Add "emgroup()" in "R/fcn_emgroup.r" to call "R_emgroup()"
    in "src/R_emgroup.c".
  * Add "starts_via_svd()" in "R/fcn_init_svd.r" to call "R_starts_via_svd()"
    in "src/R_init_svd.c".
  * Add "demo/test_emgroup.r" and "demo/test_starts_via_svd.r".
  * Add "data/da1.rda".

2008-09-24: Ver. 0.1-1
  * Initial the package "EMCluster".