+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
projects / pspp / blobdiff