1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2005, 2006, 2007, 2009, 2010, 2011, 2012, 2013, 2014, 2016 Free Software Foundation, Inc
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include <gsl/gsl_cdf.h>
22 #include "data/case.h"
23 #include "data/casegrouper.h"
24 #include "data/casereader.h"
25 #include "data/dataset.h"
26 #include "data/dictionary.h"
27 #include "data/format.h"
28 #include "data/variable.h"
29 #include "data/subcase.h"
30 #include "data/casewriter.h"
31 #include "data/short-names.h"
32 #include "language/command.h"
33 #include "language/lexer/lexer.h"
34 #include "language/lexer/variable-parser.h"
35 #include "language/stats/sort-criteria.h"
36 #include "math/sort.h"
37 #include "libpspp/assertion.h"
38 #include "libpspp/i18n.h"
39 #include "libpspp/message.h"
40 #include "libpspp/misc.h"
41 #include "libpspp/pool.h"
42 #include "libpspp/string-set.h"
43 #include "libpspp/taint.h"
45 #include "output/tab.h"
48 #define _(msgid) gettext (msgid)
49 #define N_(msgid) (msgid)
53 typedef double (*rank_function_t) (const struct rank*, double c, double cc, double cc_1,
56 static double rank_proportion (const struct rank *, double c, double cc, double cc_1,
59 static double rank_normal (const struct rank *, double c, double cc, double cc_1,
62 static double rank_percent (const struct rank *, double c, double cc, double cc_1,
65 static double rank_rfraction (const struct rank *, double c, double cc, double cc_1,
68 static double rank_rank (const struct rank *, double c, double cc, double cc_1,
71 static double rank_n (const struct rank *, double c, double cc, double cc_1,
74 static double rank_savage (const struct rank *, double c, double cc, double cc_1,
77 static double rank_ntiles (const struct rank *, double c, double cc, double cc_1,
94 static const struct fmt_spec dest_format[n_RANK_FUNCS] = {
95 {FMT_F, 9, 3}, /* rank */
96 {FMT_F, 6, 4}, /* normal */
97 {FMT_F, 6, 2}, /* percent */
98 {FMT_F, 6, 4}, /* rfraction */
99 {FMT_F, 6, 4}, /* proportion */
100 {FMT_F, 6, 0}, /* n */
101 {FMT_F, 3, 0}, /* ntiles */
102 {FMT_F, 8, 4} /* savage */
105 static const char * const function_name[n_RANK_FUNCS] = {
116 static const rank_function_t rank_func[n_RANK_FUNCS] = {
146 enum rank_func rfunc;
147 const char **dest_names;
148 const char **dest_labels;
151 /* If NEW_NAME exists in DICT or NEW_NAMES, returns NULL without changing
152 anything. Otherwise, inserts NEW_NAME in NEW_NAMES and returns the copy of
153 NEW_NAME now in NEW_NAMES. */
155 try_new_name (const char *new_name,
156 const struct dictionary *dict, struct string_set *new_names)
158 return (!dict_lookup_var (dict, new_name)
159 && string_set_insert (new_names, new_name)
160 ? string_set_find_node (new_names, new_name)->string
164 /* Returns a variable name for storing ranks of a variable named SRC_NAME
165 accoring to the rank function F. The name chosen will not be one already in
168 If successful, adds the new name to NEW_NAMES and returns the name added.
169 If no name can be generated, returns NULL. */
171 rank_choose_dest_name (struct dictionary *dict, struct string_set *new_names,
172 enum rank_func f, const char *src_name)
179 /* Try the first character of the ranking function followed by the first 7
180 bytes of the srcinal variable name. */
181 src_name_7 = utf8_encoding_trunc (src_name, dict_get_encoding (dict), 7);
182 snprintf (name, sizeof name, "%c%s", function_name[f][0], src_name_7);
184 s = try_new_name (name, dict, new_names);
189 for (i = 1; i <= 999; i++)
191 sprintf (name, "%.3s%03d", function_name[f], i);
192 s = try_new_name (name, dict, new_names);
198 for (i = 1; i <= 99; i++)
200 sprintf (name, "RNK%.2s%02d", function_name[f], i);
201 s = try_new_name (name, dict, new_names);
206 msg (ME, _("Cannot generate variable name for ranking %s with %s. "
207 "All candidates in use."),
208 src_name, function_name[f]);
214 struct dictionary *dict;
218 const struct variable **vars;
221 const struct variable **group_vars;
225 enum mv_class exclude;
227 struct rank_spec *rs;
232 enum fraction fraction;
237 /* Pool on which cell functions may allocate data */
243 destroy_rank (struct rank *rank)
246 free (rank->group_vars);
247 subcase_destroy (&rank->sc);
248 pool_destroy (rank->pool);
252 parse_into (struct lexer *lexer, struct rank *cmd,
253 struct string_set *new_names)
256 struct rank_spec *rs = NULL;
258 cmd->rs = pool_realloc (cmd->pool, cmd->rs, sizeof (*cmd->rs) * (cmd->n_rs + 1));
259 rs = &cmd->rs[cmd->n_rs];
261 if (lex_match_id (lexer, "RANK"))
265 else if (lex_match_id (lexer, "NORMAL"))
269 else if (lex_match_id (lexer, "RFRACTION"))
271 rs->rfunc = RFRACTION;
273 else if (lex_match_id (lexer, "N"))
277 else if (lex_match_id (lexer, "SAVAGE"))
281 else if (lex_match_id (lexer, "PERCENT"))
285 else if (lex_match_id (lexer, "PROPORTION"))
287 rs->rfunc = PROPORTION;
289 else if (lex_match_id (lexer, "NTILES"))
291 if ( !lex_force_match (lexer, T_LPAREN))
294 if (! lex_force_int (lexer) )
297 cmd->k_ntiles = lex_integer (lexer);
300 if ( !lex_force_match (lexer, T_RPAREN))
307 lex_error (lexer, NULL);
312 rs->dest_names = pool_calloc (cmd->pool, cmd->n_vars,
313 sizeof *rs->dest_names);
315 if (lex_match_id (lexer, "INTO"))
317 while( lex_token (lexer) == T_ID )
319 const char *name = lex_tokcstr (lexer);
321 if ( var_count >= subcase_get_n_fields (&cmd->sc) )
322 msg (SE, _("Too many variables in %s clause."), "INTO");
323 else if ( dict_lookup_var (cmd->dict, name) != NULL )
324 msg (SE, _("Variable %s already exists."), name);
325 else if (string_set_contains (new_names, name))
326 msg (SE, _("Duplicate variable name %s."), name);
329 string_set_insert (new_names, name);
330 rs->dest_names[var_count++] = pool_strdup (cmd->pool, name);
343 /* Hardly a rank function !! */
345 rank_n (const struct rank *cmd UNUSED, double c UNUSED, double cc UNUSED, double cc_1 UNUSED,
346 int i UNUSED, double w)
353 rank_rank (const struct rank *cmd, double c, double cc, double cc_1,
354 int i, double w UNUSED)
369 rank = cc_1 + (c + 1.0)/ 2.0;
389 rank = cc_1 + c / 2.0 ;
404 rank_rfraction (const struct rank *cmd, double c, double cc, double cc_1,
407 return rank_rank (cmd, c, cc, cc_1, i, w) / w ;
412 rank_percent (const struct rank *cmd, double c, double cc, double cc_1,
415 return rank_rank (cmd, c, cc, cc_1, i, w) * 100.0 / w ;
420 rank_proportion (const struct rank *cmd, double c, double cc, double cc_1,
423 const double r = rank_rank (cmd, c, cc, cc_1, i, w) ;
427 switch ( cmd->fraction )
430 f = (r - 3.0/8.0) / (w + 0.25);
436 f = (r - 1.0/3.0) / (w + 1.0/3.0);
446 return (f > 0) ? f : SYSMIS;
450 rank_normal (const struct rank *cmd, double c, double cc, double cc_1,
453 double f = rank_proportion (cmd, c, cc, cc_1, i, w);
455 return gsl_cdf_ugaussian_Pinv (f);
459 rank_ntiles (const struct rank *cmd, double c, double cc, double cc_1,
462 double r = rank_rank (cmd, c, cc, cc_1, i, w);
465 return ( floor (( r * cmd->k_ntiles) / ( w + 1) ) + 1);
468 /* Expected value of the order statistics from an exponential distribution */
470 ee (int j, double w_star)
475 for (k = 1 ; k <= j; k++)
476 sum += 1.0 / ( w_star + 1 - k );
483 rank_savage (const struct rank *cmd UNUSED, double c, double cc, double cc_1,
484 int i UNUSED, double w)
487 const int i_1 = floor (cc_1);
488 const int i_2 = floor (cc);
490 const double w_star = (modf (w, &int_part) == 0 ) ? w : floor (w) + 1;
492 const double g_1 = cc_1 - i_1;
493 const double g_2 = cc - i_2;
495 /* The second factor is infinite, when the first is zero.
496 Therefore, evaluate the second, only when the first is non-zero */
497 const double expr1 = (1 - g_1) ? (1 - g_1) * ee(i_1+1, w_star) : ( 1 - g_1);
498 const double expr2 = g_2 ? g_2 * ee (i_2+1, w_star) : g_2 ;
501 return ee (i_1 + 1, w_star) - 1;
503 if ( i_1 + 1 == i_2 )
504 return ( ( expr1 + expr2 )/c ) - 1;
506 if ( i_1 + 2 <= i_2 )
510 for (j = i_1 + 2 ; j <= i_2; ++j )
511 sigma += ee (j, w_star);
512 return ( (expr1 + expr2 + sigma) / c) -1;
519 sum_weights (const struct casereader *input, int weight_idx)
521 if (weight_idx == -1)
522 return casereader_count_cases (input);
525 struct casereader *pass;
530 pass = casereader_clone (input);
531 for (; (c = casereader_read (pass)) != NULL; case_unref (c))
532 w += case_num_idx (c, weight_idx);
533 casereader_destroy (pass);
540 rank_sorted_file (struct casereader *input,
541 struct casewriter *output,
543 const struct rank *cmd)
545 struct casegrouper *tie_grouper;
546 struct casereader *tied_cases;
547 struct subcase input_var;
553 /* Get total group weight. */
554 w = sum_weights (input, weight_idx);
557 subcase_init (&input_var, 0, 0, SC_ASCEND);
558 tie_grouper = casegrouper_create_subcase (input, &input_var);
559 subcase_destroy (&input_var);
560 for (; casegrouper_get_next_group (tie_grouper, &tied_cases);
561 casereader_destroy (tied_cases))
563 double tw = sum_weights (tied_cases, weight_idx);
567 taint_propagate (casereader_get_taint (tied_cases),
568 casewriter_get_taint (output));
570 /* Rank tied cases. */
571 for (; (c = casereader_read (tied_cases)) != NULL; case_unref (c))
573 struct ccase *out_case;
576 out_case = case_create (casewriter_get_proto (output));
577 case_data_rw_idx (out_case, 0)->f = case_num_idx (c, 1);
578 for (i = 0; i < cmd->n_rs; ++i)
580 rank_function_t func = rank_func[cmd->rs[i].rfunc];
581 double rank = func (cmd, tw, cc, cc_1, tie_group, w);
582 case_data_rw_idx (out_case, i + 1)->f = rank;
585 casewriter_write (output, out_case);
589 casegrouper_destroy (tie_grouper);
594 rank_cmd (struct dataset *ds, const struct rank *cmd);
597 fraction_name (const struct rank *cmd)
599 switch (cmd->fraction )
601 case FRAC_BLOM: return "BLOM";
602 case FRAC_RANKIT: return "RANKIT";
603 case FRAC_TUKEY: return "TUKEY";
604 case FRAC_VW: return "VW";
605 default: NOT_REACHED ();
609 /* Returns a label for a variable derived from SRC_VAR with function F. */
611 create_var_label (struct rank *cmd, const struct variable *src_var,
615 const char *pool_label;
617 ds_init_empty (&label);
619 if ( cmd->n_group_vars > 0 )
621 struct string group_var_str;
624 ds_init_empty (&group_var_str);
626 for (g = 0 ; g < cmd->n_group_vars ; ++g )
628 if ( g > 0 ) ds_put_cstr (&group_var_str, " ");
629 ds_put_cstr (&group_var_str, var_get_name (cmd->group_vars[g]));
632 ds_put_format (&label, _("%s of %s by %s"), function_name[f],
633 var_get_name (src_var), ds_cstr (&group_var_str));
634 ds_destroy (&group_var_str);
637 ds_put_format (&label, _("%s of %s"),
638 function_name[f], var_get_name (src_var));
640 pool_label = pool_strdup (cmd->pool, ds_cstr (&label));
648 cmd_rank (struct lexer *lexer, struct dataset *ds)
650 struct string_set new_names;
652 struct rank_spec *rs;
655 subcase_init_empty (&rank.sc);
659 rank.exclude = MV_ANY;
660 rank.n_group_vars = 0;
661 rank.group_vars = NULL;
662 rank.dict = dataset_dict (ds);
663 rank.ties = TIES_MEAN;
664 rank.fraction = FRAC_BLOM;
666 rank.pool = pool_create ();
668 string_set_init (&new_names);
670 if (lex_match_id (lexer, "VARIABLES"))
671 lex_force_match (lexer, T_EQUALS);
673 if (!parse_sort_criteria (lexer, rank.dict,
678 rank.n_vars = rank.sc.n_fields;
680 if (lex_match (lexer, T_BY) )
682 if ( ! parse_variables_const (lexer, rank.dict,
683 &rank.group_vars, &rank.n_group_vars,
684 PV_NO_DUPLICATE | PV_NO_SCRATCH))
689 while (lex_token (lexer) != T_ENDCMD )
691 lex_force_match (lexer, T_SLASH);
692 if (lex_match_id (lexer, "TIES"))
694 lex_force_match (lexer, T_EQUALS);
695 if (lex_match_id (lexer, "MEAN"))
697 rank.ties = TIES_MEAN;
699 else if (lex_match_id (lexer, "LOW"))
701 rank.ties = TIES_LOW;
703 else if (lex_match_id (lexer, "HIGH"))
705 rank.ties = TIES_HIGH;
707 else if (lex_match_id (lexer, "CONDENSE"))
709 rank.ties = TIES_CONDENSE;
713 lex_error (lexer, NULL);
717 else if (lex_match_id (lexer, "FRACTION"))
719 lex_force_match (lexer, T_EQUALS);
720 if (lex_match_id (lexer, "BLOM"))
722 rank.fraction = FRAC_BLOM;
724 else if (lex_match_id (lexer, "TUKEY"))
726 rank.fraction = FRAC_TUKEY;
728 else if (lex_match_id (lexer, "VW"))
730 rank.fraction = FRAC_VW;
732 else if (lex_match_id (lexer, "RANKIT"))
734 rank.fraction = FRAC_RANKIT;
738 lex_error (lexer, NULL);
742 else if (lex_match_id (lexer, "PRINT"))
744 lex_force_match (lexer, T_EQUALS);
745 if (lex_match_id (lexer, "YES"))
749 else if (lex_match_id (lexer, "NO"))
755 lex_error (lexer, NULL);
759 else if (lex_match_id (lexer, "MISSING"))
761 lex_force_match (lexer, T_EQUALS);
762 if (lex_match_id (lexer, "INCLUDE"))
764 rank.exclude = MV_SYSTEM;
766 else if (lex_match_id (lexer, "EXCLUDE"))
768 rank.exclude = MV_ANY;
772 lex_error (lexer, NULL);
776 else if (! parse_into (lexer, &rank, &new_names))
781 /* If no rank specs are given, then apply a default */
784 struct rank_spec *rs;
786 rs = pool_calloc (rank.pool, 1, sizeof *rs);
788 rs->dest_names = pool_calloc (rank.pool, rank.n_vars,
789 sizeof *rs->dest_names);
795 /* Choose variable names for all rank destinations which haven't already been
796 created with INTO. */
797 for (rs = rank.rs; rs < &rank.rs[rank.n_rs]; rs++)
801 rs->dest_labels = pool_calloc (rank.pool, rank.n_vars,
802 sizeof *rs->dest_labels);
803 for ( v = 0 ; v < rank.n_vars ; v ++ )
805 const char **dst_name = &rs->dest_names[v];
806 if ( *dst_name == NULL )
808 *dst_name = rank_choose_dest_name (rank.dict, &new_names,
810 var_get_name (rank.vars[v]));
811 if (*dst_name == NULL)
815 rs->dest_labels[v] = create_var_label (&rank, rank.vars[v],
824 tab_output_text_format (0, _("Variables Created By %s"), "RANK");
825 tab_output_text (0, "");
827 for (i = 0 ; i < rank.n_rs ; ++i )
829 for ( v = 0 ; v < rank.n_vars ; v ++ )
831 if ( rank.n_group_vars > 0 )
833 struct string varlist;
836 ds_init_empty (&varlist);
837 for ( g = 0 ; g < rank.n_group_vars ; ++g )
839 ds_put_cstr (&varlist, var_get_name (rank.group_vars[g]));
841 if ( g < rank.n_group_vars - 1)
842 ds_put_cstr (&varlist, " ");
845 if ( rank.rs[i].rfunc == NORMAL ||
846 rank.rs[i].rfunc == PROPORTION )
847 tab_output_text_format (0,
848 _("%s into %s(%s of %s using %s BY %s)"),
849 var_get_name (rank.vars[v]),
850 rank.rs[i].dest_names[v],
851 function_name[rank.rs[i].rfunc],
852 var_get_name (rank.vars[v]),
853 fraction_name (&rank),
857 tab_output_text_format (0,
858 _("%s into %s(%s of %s BY %s)"),
859 var_get_name (rank.vars[v]),
860 rank.rs[i].dest_names[v],
861 function_name[rank.rs[i].rfunc],
862 var_get_name (rank.vars[v]),
864 ds_destroy (&varlist);
868 if ( rank.rs[i].rfunc == NORMAL ||
869 rank.rs[i].rfunc == PROPORTION )
870 tab_output_text_format (0,
871 _("%s into %s(%s of %s using %s)"),
872 var_get_name (rank.vars[v]),
873 rank.rs[i].dest_names[v],
874 function_name[rank.rs[i].rfunc],
875 var_get_name (rank.vars[v]),
876 fraction_name (&rank));
879 tab_output_text_format (0,
880 _("%s into %s(%s of %s)"),
881 var_get_name (rank.vars[v]),
882 rank.rs[i].dest_names[v],
883 function_name[rank.rs[i].rfunc],
884 var_get_name (rank.vars[v]));
891 rank_cmd (ds, &rank);
893 destroy_rank (&rank);
894 string_set_destroy (&new_names);
899 destroy_rank (&rank);
900 string_set_destroy (&new_names);
904 /* RANK transformation. */
909 struct rank_trns_input_var *input_vars;
915 struct rank_trns_input_var
917 struct casereader *input;
918 struct ccase *current;
920 struct variable **output_vars;
924 advance_ranking (struct rank_trns_input_var *iv)
926 case_unref (iv->current);
927 iv->current = casereader_read (iv->input);
931 rank_trns_proc (void *trns_, struct ccase **c, casenumber case_idx UNUSED)
933 struct rank_trns *trns = trns_;
934 double order = case_num_idx (*c, trns->order_case_idx);
935 struct rank_trns_input_var *iv;
937 *c = case_unshare (*c);
938 for (iv = trns->input_vars; iv < &trns->input_vars[trns->n_input_vars]; iv++)
939 while (iv->current != NULL)
941 double iv_order = case_num_idx (iv->current, 0);
942 if (iv_order == order)
946 for (i = 0; i < trns->n_funcs; i++)
947 case_data_rw (*c, iv->output_vars[i])->f
948 = case_num_idx (iv->current, i + 1);
949 advance_ranking (iv);
952 else if (iv_order > order)
955 advance_ranking (iv);
957 return TRNS_CONTINUE;
961 rank_trns_free (void *trns_)
963 struct rank_trns *trns = trns_;
964 struct rank_trns_input_var *iv;
966 for (iv = trns->input_vars; iv < &trns->input_vars[trns->n_input_vars]; iv++)
968 casereader_destroy (iv->input);
969 case_unref (iv->current);
971 free (iv->output_vars);
973 free (trns->input_vars);
980 rank_cmd (struct dataset *ds, const struct rank *cmd)
982 struct dictionary *d = dataset_dict (ds);
983 struct variable *weight_var = dict_get_weight (d);
984 struct casewriter **outputs;
985 struct variable *order_var;
986 struct casereader *input;
987 struct rank_trns *trns;
991 order_var = add_permanent_ordering_transformation (ds);
993 /* Create output files. */
995 struct caseproto *output_proto;
996 struct subcase by_order;
998 output_proto = caseproto_create ();
999 for (i = 0; i < cmd->n_rs + 1; i++)
1000 output_proto = caseproto_add_width (output_proto, 0);
1002 subcase_init (&by_order, 0, 0, SC_ASCEND);
1004 outputs = xnmalloc (cmd->n_vars, sizeof *outputs);
1005 for (i = 0; i < cmd->n_vars; i++)
1006 outputs[i] = sort_create_writer (&by_order, output_proto);
1008 subcase_destroy (&by_order);
1009 caseproto_unref (output_proto);
1012 /* Open the active file and make one pass per input variable. */
1013 input = proc_open (ds);
1014 input = casereader_create_filter_weight (input, d, NULL, NULL);
1015 for (i = 0 ; i < cmd->n_vars ; ++i )
1017 const struct variable *input_var = cmd->vars[i];
1018 struct casereader *input_pass;
1019 struct casegrouper *split_grouper;
1020 struct casereader *split_group;
1021 struct subcase rank_ordering;
1022 struct subcase projection;
1023 struct subcase split_vars;
1024 struct subcase group_vars;
1028 /* Discard cases that have missing values of input variable. */
1029 input_pass = i == cmd->n_vars - 1 ? input : casereader_clone (input);
1030 input_pass = casereader_create_filter_missing (input_pass, &input_var, 1,
1031 cmd->exclude, NULL, NULL);
1033 /* Keep only the columns we really need, to save time and space when we
1034 sort them just below.
1036 After this projection, the input_pass case indexes look like:
1040 - 2 and up: cmd->n_group_vars group variables
1041 - 2 + cmd->n_group_vars and up: split variables
1042 - 2 + cmd->n_group_vars + n_split_vars: weight var
1044 subcase_init_empty (&projection);
1045 subcase_add_var_always (&projection, input_var, SC_ASCEND);
1046 subcase_add_var_always (&projection, order_var, SC_ASCEND);
1047 subcase_add_vars_always (&projection,
1048 cmd->group_vars, cmd->n_group_vars);
1049 subcase_add_vars_always (&projection, dict_get_split_vars (d),
1050 dict_get_split_cnt (d));
1051 if (weight_var != NULL)
1053 subcase_add_var_always (&projection, weight_var, SC_ASCEND);
1054 weight_idx = 2 + cmd->n_group_vars + dict_get_split_cnt (d);
1058 input_pass = casereader_project (input_pass, &projection);
1059 subcase_destroy (&projection);
1061 /* Prepare 'group_vars' as the set of grouping variables. */
1062 subcase_init_empty (&group_vars);
1063 for (j = 0; j < cmd->n_group_vars; j++)
1064 subcase_add_always (&group_vars,
1065 j + 2, var_get_width (cmd->group_vars[j]),
1068 /* Prepare 'rank_ordering' for sorting with the group variables as
1069 primary key and the input variable as secondary key. */
1070 subcase_clone (&rank_ordering, &group_vars);
1071 subcase_add (&rank_ordering, 0, 0, subcase_get_direction (&cmd->sc, i));
1073 /* Group by split variables */
1074 subcase_init_empty (&split_vars);
1075 for (j = 0; j < dict_get_split_cnt (d); j++)
1076 subcase_add_always (&split_vars, 2 + j + cmd->n_group_vars,
1077 var_get_width (dict_get_split_vars (d)[j]),
1079 split_grouper = casegrouper_create_subcase (input_pass, &split_vars);
1080 subcase_destroy (&split_vars);
1081 while (casegrouper_get_next_group (split_grouper, &split_group))
1083 struct casereader *ordered;
1084 struct casegrouper *by_grouper;
1085 struct casereader *by_group;
1087 ordered = sort_execute (split_group, &rank_ordering);
1088 by_grouper = casegrouper_create_subcase (ordered, &group_vars);
1089 while (casegrouper_get_next_group (by_grouper, &by_group))
1090 rank_sorted_file (by_group, outputs[i], weight_idx, cmd);
1091 ok = casegrouper_destroy (by_grouper) && ok;
1093 subcase_destroy (&group_vars);
1094 subcase_destroy (&rank_ordering);
1096 ok = casegrouper_destroy (split_grouper) && ok;
1098 ok = proc_commit (ds) && ok;
1100 /* Re-fetch the dictionary and order variable, because if TEMPORARY was in
1101 effect then there's a new dictionary. */
1102 d = dataset_dict (ds);
1103 order_var = dict_lookup_var_assert (d, "$ORDER");
1105 /* Merge the original data set with the ranks (which we already sorted on
1107 trns = xmalloc (sizeof *trns);
1108 trns->order_case_idx = var_get_case_index (order_var);
1109 trns->input_vars = xnmalloc (cmd->n_vars, sizeof *trns->input_vars);
1110 trns->n_input_vars = cmd->n_vars;
1111 trns->n_funcs = cmd->n_rs;
1112 for (i = 0; i < trns->n_input_vars; i++)
1114 struct rank_trns_input_var *iv = &trns->input_vars[i];
1117 iv->input = casewriter_make_reader (outputs[i]);
1118 iv->current = casereader_read (iv->input);
1119 iv->output_vars = xnmalloc (trns->n_funcs, sizeof *iv->output_vars);
1120 for (j = 0; j < trns->n_funcs; j++)
1122 struct rank_spec *rs = &cmd->rs[j];
1123 struct variable *var;
1125 var = dict_create_var_assert (d, rs->dest_names[i], 0);
1126 var_set_both_formats (var, &dest_format[rs->rfunc]);
1127 var_set_label (var, rs->dest_labels[i]);
1129 iv->output_vars[j] = var;
1134 add_transformation (ds, rank_trns_proc, rank_trns_free, trns);
1136 /* Delete our sort key, which we don't need anymore. */
1137 dict_delete_var (d, order_var);