1 2008-04-06 Jason Stover <jhs@math.gcsu.edu>
3 * linreg.c (pspp_linreg): For the QR method of getting the least
4 squares estimates, store intercept in cache->intercept
5 instead of coefficienc structure. Partial fix of bug 22788.
7 2008-03-10 Jason Stover <jhs@math.gcsu.edu>
9 * linreg.c (pspp_linreg): Remove use of coefficient 0 as intercept.
11 2008-03-08 Jason Stover <jhs@wonko.gcsu.edu>
13 * linreg.c (pspp_linreg_get_vars): Clean up the loop that searches
14 for coefficient/variable matches. Fix for bug 22419.
16 2008-02-28 Jason Stover <jhs@math.gcsu.edu>
18 * linreg.c (has_coefficient): New function.
20 * linreg.c (pspp_linreg_predict): Fix bug 22419.
22 2007-09-21 Jason Stover <jhs@math.gcsu.edu>
24 * linreg.c (pspp_linreg_cache_free): Partial fix of memory leak,
27 2007-08-11 Jason Stover <jhs@math.gcsu.edu>
29 * linreg.h (enum): Dropped ambiguous PSPP_LINREG_SVD in favor of
30 PSPP_LINREG_QR. Added PSPP_LINREG_CONDITIONAL_INVERSE.
32 * linreg.c (pspp_linreg): Added scope and comment for use of
33 generalized inverse to solve normal equations.
35 2007-04-12 Jason Stover <jhs@math.gcsu.edu>
37 * linreg.c: (pspp_linreg_cache_free) Check for null pointer before
40 Wed Dec 6 21:16:22 2006 Ben Pfaff <blp@gnu.org>
42 * linreg.c: (pspp_linreg_get_vars) Compare variable pointers
43 instead of variable indexes.
45 2006-05-19 Jason Stover <jhs@math.gcsu.edu>
47 * coefficient.c: Moved to src/math.
49 * coefficient.h: Moved to src/math.
51 2006-05-11 Jason Stover <jhs@math.gcsu.edu>
53 * linreg.h: Made linreg_cache's coeff a pspp_linreg_coeff**.
55 2006-04-28 Jason Stover <jhs@math.gcsu.edu>
57 * linreg.c (pspp_linreg_get_vars): New function. Fills an array with
58 pointers to the variables used in the model.
60 * linreg.h: Add a pointer called get_vars to pspp_linreg_get_vars()
61 to access variables in a model.
63 * coefficient.c (pspp_linreg_coeff_init): Set the variable
64 associated with the intercept term to NULL.
66 2006-04-26 Jason Stover <jhs@math.gcsu.edu>
68 * linreg.h: Added a pointer to predicted values.
70 * linreg.c (pspp_linreg_cache_alloc): Initialized pointer to
73 2006-04-22 Jason Stover <jhs@debs.hjklfdsss.org>
75 * predict.c (pspp_linreg_residual): Removed unnecessary cast of c_
78 2006-04-18 Jason Stover <jhs@math.gcsu.edu>
80 * linreg.h: Added a pointer to a variable to store the resduals.
82 * linreg.c (pspp_linreg_cache_alloc): Initialize the residual
83 variable pointer to NULL.
85 2006-04-17 Jason Stover <jason@wonko.gcsu.edu>
87 * linreg.c (pspp_linreg_cache_free): Accept a pointer of type
88 void to match definition of trns_proc_func.
90 2006-04-17 Jason Stover <jhs@math.gcsu.edu>
92 * linreg.c (pspp_linreg_cache_free): Return a bool.
94 Sat Apr 15 18:03:01 2006 Ben Pfaff <blp@gnu.org>
96 * predict.c (pspp_linreg_predict): Change prototype to match
97 struct pspp_linreg_cache_struct's predict member.
98 * predict.c (pspp_linreg_residual): Change prototype to match
99 struct pspp_linreg_cache_struct's residual member.
101 Sat Apr 15 18:01:39 2006 Ben Pfaff <blp@gnu.org>
103 * coefficient.c (pspp_linreg_get_coeff): Compare n_indeps against
104 0, instead of NULL, because it's an integer type.
106 Mon Apr 3 13:20:54 2006 Ben Pfaff <blp@gnu.org>
108 * linreg.c (pspp_linreg): Move declaration before code for C90
111 2006-04-09 Jason Stover <jhs@math.gcsu.edu>
113 * predict.c (pspp_linreg_predict): Do something sensible even with
116 2006-04-07 Jason Stover <jhs@math.gcsu.edu>
118 * predict.c (pspp_linreg_predict): Improved handling of null
121 * predict.c (pspp_linreg_residuals): New function.
123 * coefficient.c: Improved handling of null pointer args.
125 2006-04-05 Jason Stover <jhs@math.gcsu.edu>
127 * predict.c: New file. pspp_linreg_predict() uses a linear model
128 to return a predicted value of the dependent variable.
130 * coefficient.c: Added pspp_linreg_coeff_get_est() and
131 pspp_linreg_coeff_get_std_err() to access estimated values of
132 coefficients and standard errors.
134 2006-04-03 Jason Stover <jhs@math.gcsu.edu>
136 * coefficient.c: Added pspp_linreg_get_coeff() to find a
137 coefficient corresponding to a variable/value combination.
139 Thu Mar 2 08:40:33 WST 2006 John Darrington <john@darrington.wattle.id.au>
141 * Moved files from src directory