X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2FChangeLog;h=1fdf0d54e451195d1425d1fc135d04d346f1d66d;hb=bf6d99567a762b20bee4bb71147b6387c986bb90;hp=debb7021b3f1d6f2c228f5a7061a51311fb657db;hpb=00fc43143334ef109424b6e4d9d0a0917eac5563;p=pspp

diff --git a/src/ChangeLog b/src/ChangeLog
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--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,8 +1,116 @@
+Sun Apr 11 14:22:12 2004  Ben Pfaff  <blp@gnu.org>
+
+	Rework moments routines for improved numerical stability based on
+	Michael Kiefte's advice.  Any bugs or remaining numerical problems
+	are still mine though.
+
+	There is now a struct moments1 for use with one-pass moments.  It
+	uses a provisional means algorithm as an attempt to improve
+	accuracy of higher moments.  The older struct moments now only
+	handles two-pass moments.
+	
+	* aggregate.c: Use moments1 instead moments.
+
+	* descript.c: Revert previous change, which is no longer needed
+	due to the moments revision.
+
+	* moments.c: (calc_moments) New function for calculating variance,
+	skewness, kurtosis.
+	(moments_pass_one) Only accumulate weights bigger than zero.
+	(moments_calculate) Allow calculating the mean on pass one, others
+	require pass two.  Implement in terms of calc_moments().
+	(struct moments1) New structure.
+	(init_moments1) New function.
+	(moments1_clear) Ditto.
+	(moments1_create) Ditto.
+	(moments1_add) Ditto.
+	(moments1_calculate) Ditto.
+	(moments1_destroy) Ditto.
+	(cmd_debug_moments) Deal with `struct moments' or `struct
+	moments1' as requested by user.
+
+Sun Apr 11 14:21:55 2004  Ben Pfaff  <blp@gnu.org>
+
+	* Makefile.am (pspp_SOURCES): Remove debug.c.
+
+	* debug.c: Removed.  It was empty anyway.
+
+Fri Apr  9 20:04:49 2004  Ben Pfaff  <blp@gnu.org>
+
+	* descript.c (calc_descriptives): Fix assert failure when only
+	MOMENT_MEAN is needed.
+
+2004-04-09  Michael Kiefte  <mkiefte@dal.ca>
+
+	* descript.c: 
+
+	fixed problem with parsing in match_statistic() causing
+	"DESCRIPTIVE STAT=MEAN." to barf.
+
+	"MEAN" is now default if "SORT" given without specification.
+
+	Fixed infinite loop with "DESCRIPT GIBBERISH=ALL."  Parsing is
+	generally less forgiving of syntax errors: better to have it do
+	nothing and type it in again then to not know what it actually did
+	instead.  
+
+	z-score transformation now checks score for user-missing values
+	and checks std_dev for SYSMIS.
+
+2004-04-06  Michael Kiefte  <mkiefte@dal.ca>
+
+	* aggregate.c, crosstabs.q, descript.c, dictionary.c, frequencies.q, levene.c, t-test.q, var.h: 
+	Changed dict_get_case_weight() to accept an additional int * flag
+	to complain about system-missing, user-missing, zero, or negative
+	weights and updated existing functions to pass int * to
+	dict_get_case_weight().
+
+2004-04-05  jmd  <jmd@gnu.org>
+
+	* main.c: Fixed configuration problems with gsl
+
+	* t-test.q: Fixed some problems encountered when compiling under Cygwin
+
+2004-04-03  blp  <blp@gnu.org>
+
+	* lexer.c, ChangeLog:
+	Fix infinite loop on comment at end of file, add test.
+
+2004-04-03  jmd  <jmd@gnu.org>
+
+	* settings.h, var.h, ChangeLog, Makefile.am, cmdline.c, command.c, command.h, error.h, filename.c, frequencies.q, lexer.h, main.c, q2c.c, set.q:
+	Fixed the calculation of percentiles and added --syntax and --algorithm options
+
+Sat Apr  3 11:43:37 2004  Ben Pfaff  <blp@gnu.org>
+
+	* lexer.c: (lex_skip_comment) Handle end-of-file correctly (I
+	hope).
+
+Sat Apr  3 15:00:18 WST 2004 John Darrington <john@darrington.wattle.id.au>
+
+        * frequencies.q:  Fixed the calculation of percentiles
+
+	* Makefile.am:  Added the --ansi flag and dealt with the
+	consequences.  Added some entries to PSPP_sources so that
+	make distcheck would pass
+
+	* cmdline.c:   Added the --syntax and --algorithm options
+
+	* q2c.c:  Added an implicit /ALGORITHM subcommand to everything.
+
+Fri Apr  2 11:25:22 WAST 2004 John Darrington <john@darrington.wattle.id.au>
+
+	* t-test.q, levene.c, levene.h  Converted t-test (incl levene) to 
+	use the new multipass_split_... mechanism.
+
 Wed Mar 31 22:36:22 2004  Ben Pfaff  <blp@gnu.org>
 
 	* frequencies.q: (calc_stats) Use moments data structure and
 	calc_seskew(), calc_sekurt() functions.
 
+	* set.q main.c settings.h Added support for --syntax and --algorithm 
+	options
+
 Tue Mar 30 22:04:19 2004  Ben Pfaff  <blp@gnu.org>
 
 	* vfm.c: Had to get last call to multipass_split_output() inside