Estimate parameters. Moved some code to re-usable functions.

[pspp-builds.git] / src / math / ChangeLog

diff --git a/src/math/ChangeLog b/src/math/ChangeLog
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+2008-08-17  Jason H Stover  <jhs@math.gcsu.edu>
+
+       * linreg.c (post_sweep_computations): New function to re-use the
+       re-usable. New function cache_init() to re-use the re-usable. 
+       pspp_linreg_with_cov() now estimates parameters via reg_sweep().
+
+2008-08-16  Jason H Stover  <jhs@math.gcsu.edu>
+
+       * linreg.c (pspp_linreg_with_cov): New function to estimate
+       parameters directly from covariance matrix instead of using the
+       entire data set.
+
+       * linreg.c (rearrange_covariance_matrix): New function to ensure
+       the columns of the covariance matrix correspond to the variables
+       in the model.
+
+2008-07-24   John Darrington <john@darrington.wattle.id.au>
+
+       * merge.c merge.h sort.c sort.h: Removed the value_cnt associated
+       with case ordering.  This ensures that the casereader returned by
+       sort_execute now has the same dimensions as the casereader passed 
+       in.
+
+2008-07-24  Jason H Stover  <jhs@math.gcsu.edu>
+
+       * covariance-matrix.c (covariance_pass_two): Dropped weight
+       argument. Corrected update of the entries of the covariance
+       matrix. 
+
+       * covariance-matrix.c (column_iterate): Dropped weight
+       argument. Corrected update of the entries of the covariance
+       matrix. 
+
+       * covariance-matrix.c (covariance_update_categorical_numeric):
+       Dropped weight argument. Corrected update of the entries of the
+       covariance matrix.
+
+2008-07-17  Jason H Stover  <jhs@math.gcsu.edu>
+
+       * covariance-matrix.c (covariance_update_categorical_numeric):
+       Altered to match new code in covariance_pass_two();
+
+       * covariance-matrix.h: Fix declaration of covariance_pass_two.
+
+       * covariance-matrix.c (covariance_pass_two): Moved numeric and
+       categorical scopes of V2 inside for loop. If V1 is not
+       categorical, but V2 is, recurse with the order of the variables
+       reversed to use the code in the previous "if" scope.
+
+2008-07-16  Jason Stover  <jhs@math.gcsu.edu>
+
+       * covariance-matrix.c (covariance_pass_two): Renamed
+       covariance_pass_one. Fixed update of covariance matrix when both
+       variables are categorical.
+       (column_iterate): New function.
+
+2008-07-15  Jason Stover  <jhs@math.gcsu.edu>
+
+       * covariance-matrix.c (covariance_pass_one): New file, new function.
+
+2008-06-21  Jason Stover  <jhs@math.gcsu.edu>
+
+       * linreg.c (pspp_linreg): Accept a struct design_matrix.  Use new
+       accessor functions pspp_coeff_get_mean, pspp_coeff_get_sd.  New
+       functions pspp_linreg_get_indep_variable_mean,
+       pspp_linreg_set_indep_variable_mean,
+       pspp_linreg_get_indep_variable_sd,
+       pspp_linreg_set_indep_variable_sd. Altered pspp_linreg_get_coeff
+       to use accessor function pspp_coeff_var_to_coeff.
+
+       * coefficient.c: New functions pspp_coeff_get_mean,
+       pspp_coeff_set_mean, pspp_coeff_get_sd, pspp_coeff_set_sd,
+       pspp_coeff_var_to_coeff. Added doubles to hold mean and standard
+       deviation in struct varinfo.
+
+2008-06-14  Jason Stover  <jhs@math.gcsu.edu>
+
+       * linreg/: moved linreg.[ch] to src/math.
+
+2008-05-15  Ben Pfaff  <blp@gnu.org>
+
+       Patch #6512.
+
+       * moments.c (calc_moments): Use gsl_finite instead of finite, as a
+       stopgap measure for portability until appropriate gnulib modules
+       are available.
+
+2008-03-10  Jason Stover  <jhs@math.gcsu.edu>
+
+       * coefficient.c (pspp_linreg_get_coeff): Removed use of
+       coefficient 0 as intercept.
+
 2008-03-01  Jason Stover  <jhs@math.gcsu.edu>
 
        * coefficient.c (pspp_coeff_init): Ensure first arg is not a null