static struct cmd_t_test cmd;
+
static struct pool *t_test_pool ;
/* Variable for the GROUPS subcommand, if given. */
/* Submit and destroy a ssbox */
void ssbox_finalize(struct ssbox *ssb);
+/* A function to create, populate and submit the Paired Samples Correlation
+ box */
+void pscbox(struct cmd_t_test *cmd);
/* Structures and Functions for the Test Results Box */
T_PAIRED
};
+
+static int common_calc (struct ccase *);
+static void common_precalc (void);
+static void common_postcalc (void);
+
+static int one_sample_calc (struct ccase *);
+static void one_sample_precalc (void);
+static void one_sample_postcalc (void);
+
+
int
cmd_t_test(void)
{
struct ssbox stat_summary_box;
struct trbox test_results_box;
-
if (!lex_force_match_id ("T"))
return CMD_FAILURE;
if ( !parse_t_test(&cmd) )
return CMD_FAILURE;
-
if (! cmd.sbc_criteria)
cmd.criteria=0.95;
-
if ( cmd.sbc_testval + cmd.sbc_groups + cmd.sbc_pairs != 1 )
{
msg(SE,
return CMD_FAILURE;
}
+ procedure(common_precalc,common_calc,common_postcalc);
+ if (mode == T_1_SAMPLE)
+ procedure(one_sample_precalc,one_sample_calc,one_sample_postcalc);
t_test_pool = pool_create ();
ssbox_create(&stat_summary_box,&cmd,mode);
- trbox_create(&test_results_box,&cmd,mode);
-
ssbox_populate(&stat_summary_box,&cmd);
- trbox_populate(&test_results_box,&cmd);
-
ssbox_finalize(&stat_summary_box);
+
+ if ( mode == T_PAIRED)
+ {
+ pscbox(&cmd);
+ }
+
+ trbox_create(&test_results_box,&cmd,mode);
+ trbox_populate(&test_results_box,&cmd);
trbox_finalize(&test_results_box);
pool_destroy (t_test_pool);
t_test_pool=0;
-
return CMD_SUCCESS;
}
-
static int
tts_custom_groups (struct cmd_t_test *cmd unused)
{
if (!lex_match ('('))
{
-
if (groups->type == NUMERIC)
{
n_groups_values = 2;
n_groups_values = 1;
lex_match (',');
-
if (lex_match (')'))
return 1;
return 1;
}
+
+
+
static int
tts_custom_pairs (struct cmd_t_test *cmd unused)
{
struct variable **vars;
int n_vars;
+
int n_before_WITH ;
- int n_after_WITH =-1;
+ int n_after_WITH = -1;
int paired ; /* Was the PAIRED keyword given ? */
lex_match('=');
free (vars);
return 0;
}
-
-
assert (n_vars);
n_before_WITH=0;
if (lex_match (T_WITH))
{
n_before_WITH = n_vars;
-
if (!parse_variables (default_dict, &vars, &n_vars,
PV_DUPLICATE | PV_APPEND
| PV_NUMERIC | PV_NO_SCRATCH))
free (vars);
return 0;
}
-
n_after_WITH = n_vars - n_before_WITH;
}
-
paired = (lex_match ('(') && lex_match_id ("PAIRED") && lex_match (')'));
-
/* Determine the number of pairs needed */
-
if (paired)
{
if (n_before_WITH != n_after_WITH)
n_before_WITH, n_after_WITH );
return 0;
}
-
n_pairs=n_before_WITH;
-
}
else if (n_before_WITH > 0) /* WITH keyword given, but not PAIRED keyword */
{
}
/* Allocate storage for the pairs */
-
pairs = xrealloc(pairs,sizeof(pair_t) *n_pairs);
-
/* Populate the pairs with the appropriate variables */
-
if ( paired )
{
int i;
return 1;
}
-
/* Parses the current token (numeric or string, depending on type)
value v and returns success. */
static int
}
-/* *******************************************************************
- SSBOX Implementation
-
- ***************************************************************** */
-
-
+/* Implementation of the SSBOX object */
void ssbox_base_init(struct ssbox *this, int cols,int rows);
void
ssbox_create(struct ssbox *ssb, struct cmd_t_test *cmd, int mode)
{
-
switch (mode)
{
case T_1_SAMPLE:
default:
assert(0);
}
-
}
+/* Despatcher for the populate method */
void
ssbox_populate(struct ssbox *ssb,struct cmd_t_test *cmd)
{
}
+/* Despatcher for finalize */
void
ssbox_finalize(struct ssbox *ssb)
{
}
-
+/* Submit the box and clear up */
void
ssbox_base_finalize(struct ssbox *ssb)
{
tab_submit(ssb->t);
}
-
+/* Initialize a ssbox struct */
void
ssbox_base_init(struct ssbox *this, int cols,int rows)
{
this->t = tab_create (cols, rows, 0);
tab_columns (this->t, SOM_COL_DOWN, 1);
-
tab_headers (this->t,0,0,1,0);
-
tab_box (this->t, TAL_2, TAL_2, TAL_0, TAL_1, 0, 0, cols -1, rows -1 );
-
tab_hline(this->t, TAL_2,0,cols-1,1);
-
tab_dim (this->t, tab_natural_dimensions);
-
}
-
-
void ssbox_one_sample_populate(struct ssbox *ssb,
struct cmd_t_test *cmd);
-
-
+/* Initialize the one_sample ssbox */
void
ssbox_one_sample_init(struct ssbox *this,
struct cmd_t_test *cmd )
this->populate = ssbox_one_sample_populate;
ssbox_base_init(this, hsize,vsize);
-
-
tab_title (this->t, 0, _("One-Sample Statistics"));
-
tab_vline(this->t, TAL_2, 1,0,vsize);
-
tab_text (this->t, 1, 0, TAB_CENTER | TAT_TITLE, _("N"));
tab_text (this->t, 2, 0, TAB_CENTER | TAT_TITLE, _("Mean"));
tab_text (this->t, 3, 0, TAB_CENTER | TAT_TITLE, _("Std. Deviation"));
tab_text (this->t, 4, 0, TAB_CENTER | TAT_TITLE, _("SE. Mean"));
-
-
}
-
void ssbox_independent_samples_populate(struct ssbox *ssb,
struct cmd_t_test *cmd);
-
+/* Initialize the independent samples ssbox */
void
ssbox_independent_samples_init(struct ssbox *this,
struct cmd_t_test *cmd)
-
{
int hsize=6;
int vsize = cmd->n_variables*2 +1;
this->populate = ssbox_independent_samples_populate;
ssbox_base_init(this, hsize,vsize);
-
tab_title (this->t, 0, _("Group Statistics"));
-
tab_vline(this->t,0,1,0,vsize);
-
tab_text (this->t, 1, 0, TAB_CENTER | TAT_TITLE, groups->name);
-
tab_text (this->t, 2, 0, TAB_CENTER | TAT_TITLE, _("N"));
tab_text (this->t, 3, 0, TAB_CENTER | TAT_TITLE, _("Mean"));
tab_text (this->t, 4, 0, TAB_CENTER | TAT_TITLE, _("Std. Deviation"));
tab_text (this->t, 5, 0, TAB_CENTER | TAT_TITLE, _("SE. Mean"));
-
-
}
+/* Populate the ssbox for independent samples */
void
ssbox_independent_samples_populate(struct ssbox *ssb,
struct cmd_t_test *cmd)
val_lab2 = groups_values[1].s;
}
-
assert(ssb->t);
for (i=0; i < cmd->n_variables; ++i)
{
- tab_text (ssb->t, 0, i*2+1,
- TAB_LEFT, cmd->v_variables[i]->name);
+ tab_text (ssb->t, 0, i*2+1, TAB_LEFT, cmd->v_variables[i]->name);
if (val_lab1)
- tab_text (ssb->t, 1, i*2+1,
- TAB_LEFT, val_lab1);
+ tab_text (ssb->t, 1, i*2+1, TAB_LEFT, val_lab1);
else
- tab_float(ssb->t, 1 ,i*2+1,
- TAB_LEFT, groups_values[0].f, 2,0);
-
+ tab_float(ssb->t, 1 ,i*2+1, TAB_LEFT, groups_values[0].f, 2,0);
if (val_lab2)
- tab_text (ssb->t, 1, i*2+1+1,
- TAB_LEFT, val_lab2);
+ tab_text (ssb->t, 1, i*2+1+1, TAB_LEFT, val_lab2);
else
- tab_float(ssb->t, 1 ,i*2+1+1,
- TAB_LEFT, groups_values[1].f,2,0);
-
-
+ tab_float(ssb->t, 1 ,i*2+1+1, TAB_LEFT, groups_values[1].f,2,0);
}
-
}
void ssbox_paired_populate(struct ssbox *ssb,
struct cmd_t_test *cmd);
-
+/* Initialize the paired values ssbox */
void
-ssbox_paired_init(struct ssbox *this,
- struct cmd_t_test *cmd unused)
+ssbox_paired_init(struct ssbox *this, struct cmd_t_test *cmd unused)
{
int hsize=6;
this->populate = ssbox_paired_populate;
ssbox_base_init(this, hsize,vsize);
-
tab_title (this->t, 0, _("Paired Sample Statistics"));
-
tab_vline(this->t,TAL_0,1,0,vsize-1);
tab_vline(this->t,TAL_2,2,0,vsize-1);
-
tab_text (this->t, 2, 0, TAB_CENTER | TAT_TITLE, _("Mean"));
tab_text (this->t, 3, 0, TAB_CENTER | TAT_TITLE, _("N"));
tab_text (this->t, 4, 0, TAB_CENTER | TAT_TITLE, _("Std. Deviation"));
tab_text (this->t, 5, 0, TAB_CENTER | TAT_TITLE, _("SE. Mean"));
-
-
}
+/* Populate the ssbox for paired values */
void
-ssbox_paired_populate(struct ssbox *ssb,
- struct cmd_t_test *cmd unused)
+ssbox_paired_populate(struct ssbox *ssb,struct cmd_t_test *cmd unused)
{
int i;
struct string ds;
assert(ssb->t);
-
ds_init(t_test_pool,&ds,15);
-
for (i=0; i < n_pairs; ++i)
{
-
ds_clear(&ds);
ds_printf(&ds,_("Pair %d"),i);
tab_text (ssb->t, 0, i*2+1, TAB_LEFT, ds.string);
-
tab_text (ssb->t, 1, i*2+1, TAB_LEFT, pairs[i][0]->name);
tab_text (ssb->t, 1, i*2+2, TAB_LEFT, pairs[i][1]->name);
}
ds_destroy(&ds);
}
-
+/* Populate the one sample ssbox */
void
-ssbox_one_sample_populate(struct ssbox *ssb,
- struct cmd_t_test *cmd)
+ssbox_one_sample_populate(struct ssbox *ssb, struct cmd_t_test *cmd)
{
int i;
for (i=0; i < cmd->n_variables; ++i)
{
- tab_text (ssb->t, 0, i+1,
- TAB_LEFT, cmd->v_variables[i]->name);
+ struct t_test_proc *ttp;
+ ttp= &cmd->v_variables[i]->p.t_t;
+
+ tab_text (ssb->t, 0, i+1, TAB_LEFT, cmd->v_variables[i]->name);
+ tab_float (ssb->t,1, i+1, TAB_RIGHT, ttp->n, 2, 0);
+ tab_float (ssb->t,2, i+1, TAB_RIGHT, ttp->mean, 8, 2);
+ tab_float (ssb->t,3, i+1, TAB_RIGHT, ttp->std_dev, 8, 2);
+ tab_float (ssb->t,4, i+1, TAB_RIGHT, ttp->se_mean, 8, 3);
}
}
-/* ****************************************************************
- TEST RESULT BOX Implementation
-
- *****************************************************************/
+/* Implementation of the Test Results box struct */
void trbox_base_init(struct trbox *self,int n_vars, int cols);
void trbox_base_finalize(struct trbox *trb);
-/* Create a trbox */
+/* Create a trbox according to mode*/
void
trbox_create(struct trbox *trb,
struct cmd_t_test *cmd, int mode)
{
-
switch (mode)
{
case T_1_SAMPLE:
trbox_one_sample_init(trb,cmd);
break;
-
-
case T_IND_SAMPLES:
trbox_independent_samples_init(trb,cmd);
break;
-
-
case T_PAIRED:
trbox_paired_init(trb,cmd);
break;
-
default:
assert(0);
}
-
}
/* Populate a trbox according to cmd */
trb->finalize(trb);
}
-
+/* Initialize the independent samples trbox */
void
trbox_independent_samples_init(struct trbox *self,
struct cmd_t_test *cmd unused)
struct string ds;
assert(self);
-
self->populate = trbox_independent_samples_populate;
trbox_base_init(self,cmd->n_variables*2,hsize);
-
tab_title(self->t,0,_("Independent Samples Test"));
-
tab_hline(self->t,TAL_1,2,hsize-1,1);
tab_vline(self->t,TAL_2,2,0,vsize-1);
-
tab_vline(self->t,TAL_1,4,0,vsize-1);
-
- tab_box(self->t,-1,-1,-1,TAL_1,
- 2,1,hsize-2,vsize-1);
-
-
- tab_hline(self->t,TAL_1,
- hsize-2,hsize-1,2);
-
- tab_box(self->t,-1,-1,-1,TAL_1,
- hsize-2,2,hsize-1,vsize-1);
-
-
- tab_joint_text(self->t, 2,0,3,0,
+ tab_box(self->t,-1,-1,-1,TAL_1, 2,1,hsize-2,vsize-1);
+ tab_hline(self->t,TAL_1, hsize-2,hsize-1,2);
+ tab_box(self->t,-1,-1,-1,TAL_1, hsize-2,2,hsize-1,vsize-1);
+ tab_joint_text(self->t, 2, 0, 3, 0,
TAB_CENTER,_("Levine's Test for Equality of Variances"));
-
tab_joint_text(self->t, 4,0,hsize-1,0,
TAB_CENTER,_("t-test for Equality of Means"));
-
tab_text(self->t,2,2, TAB_CENTER | TAT_TITLE,_("F"));
tab_text(self->t,3,2, TAB_CENTER | TAT_TITLE,_("Sig."));
tab_text(self->t,4,2, TAB_CENTER | TAT_TITLE,_("t"));
tab_text(self->t,9,2, TAB_CENTER | TAT_TITLE,_("Lower"));
tab_text(self->t,10,2, TAB_CENTER | TAT_TITLE,_("Upper"));
-
ds_init(t_test_pool,&ds,80);
ds_printf(&ds,_("%d%% Confidence Interval of the Difference"),
(int)round(cmd->criteria*100.0));
- tab_joint_text(self->t,9,1,10,1,TAB_CENTER,
- ds.string);
-
+ tab_joint_text(self->t,9,1,10,1,TAB_CENTER, ds.string);
ds_destroy(&ds);
-
-
-
}
+/* Populate the independent samples trbox */
void
trbox_independent_samples_populate(struct trbox *self,
- struct cmd_t_test *cmd )
+ struct cmd_t_test *cmd )
{
int i;
assert(self);
-
for (i=0; i < cmd->n_variables; ++i)
{
- tab_text (self->t, 0, i*2+3,
- TAB_LEFT, cmd->v_variables[i]->name);
+ tab_text (self->t, 0, i*2+3, TAB_LEFT, cmd->v_variables[i]->name);
- tab_text (self->t, 1, i*2+3,
- TAB_LEFT, _("Equal variances assumed"));
+ tab_text (self->t, 1, i*2+3, TAB_LEFT, _("Equal variances assumed"));
tab_text (self->t, 1, i*2+3+1,
TAB_LEFT, _("Equal variances not assumed"));
-
-
}
-
}
-
+/* Initialize the paired samples trbox */
void
trbox_paired_init(struct trbox *self,
struct cmd_t_test *cmd unused)
self->populate = trbox_paired_populate;
trbox_base_init(self,n_pairs*2,hsize);
-
-
tab_title (self->t, 0, _("Paired Samples Test"));
-
-
tab_hline(self->t,TAL_1,2,6,1);
tab_vline(self->t,TAL_2,2,0,vsize);
-
-
-
tab_joint_text(self->t,2,0,6,0,TAB_CENTER,_("Paired Differences"));
-
-
- tab_box(self->t,-1,-1,-1,TAL_1,
- 2,1,6,vsize-1);
-
-
- tab_box(self->t,-1,-1,-1,TAL_1,
- 6,0,hsize-1,vsize-1);
-
-
-
+ tab_box(self->t,-1,-1,-1,TAL_1, 2,1,6,vsize-1);
+ tab_box(self->t,-1,-1,-1,TAL_1, 6,0,hsize-1,vsize-1);
tab_hline(self->t,TAL_1,5,6, 2);
tab_vline(self->t,TAL_0,6,0,1);
-
ds_init(t_test_pool,&ds,80);
ds_printf(&ds,_("%d%% Confidence Interval of the Difference"),
(int)round(cmd->criteria*100.0));
- tab_joint_text(self->t,5,1,6,1,TAB_CENTER,
- ds.string);
-
+ tab_joint_text(self->t,5,1,6,1,TAB_CENTER, ds.string);
ds_destroy(&ds);
tab_text (self->t, 7, 2, TAB_CENTER | TAT_TITLE, _("t"));
tab_text (self->t, 8, 2, TAB_CENTER | TAT_TITLE, _("df"));
tab_text (self->t, 9, 2, TAB_CENTER | TAT_TITLE, _("Sig. (2-tailed)"));
-
-
-
-
-
-
-
}
-
+/* Populate the paired samples trbox */
void
trbox_paired_populate(struct trbox *trb,
struct cmd_t_test *cmd unused)
int i;
struct string ds;
-
ds_init(t_test_pool,&ds,15);
for (i=0; i < n_pairs; ++i)
{
-
ds_clear(&ds);
-
ds_printf(&ds,_("Pair %d"),i);
tab_text (trb->t, 0, i*2+3, TAB_LEFT, ds.string);
-
tab_text (trb->t, 1, i*2+3, TAB_LEFT, pairs[i][0]->name);
tab_text (trb->t, 1, i*2+4, TAB_LEFT, pairs[i][1]->name);
}
-
-
ds_destroy(&ds);
-
}
-
+/* Initialize the one sample trbox */
void
-trbox_one_sample_init(struct trbox *self,
- struct cmd_t_test *cmd )
+trbox_one_sample_init(struct trbox *self, struct cmd_t_test *cmd )
{
const int hsize=7;
const int vsize=cmd->n_variables+3;
self->populate = trbox_one_sample_populate;
- trbox_base_init(self,cmd->n_variables,hsize);
-
-
+ trbox_base_init(self, cmd->n_variables,hsize);
tab_title (self->t, 0, _("One-Sample Test"));
-
- tab_hline(self->t,TAL_1,1,hsize-1,1);
- tab_vline(self->t,TAL_2,1,0,vsize);
-
- ds_init(t_test_pool,&ds,80);
-
+ tab_hline(self->t, TAL_1, 1, hsize - 1, 1);
+ tab_vline(self->t, TAL_2, 1, 0, vsize);
+ ds_init(t_test_pool, &ds, 80);
ds_printf(&ds,_("Test Value = %f"),cmd->n_testval);
-
- tab_joint_text(self->t,1,0,hsize-1,0,TAB_CENTER,ds.string);
-
- tab_box(self->t,-1,-1,-1,TAL_1,
- 1,1,hsize-1,vsize-1);
-
+ tab_joint_text(self->t, 1, 0, hsize-1,0, TAB_CENTER,ds.string);
+ tab_box(self->t, -1, -1, -1, TAL_1, 1,1,hsize-1,vsize-1);
ds_clear(&ds);
-
ds_printf(&ds,_("%d%% Confidence Interval of the Difference"),
(int)round(cmd->criteria*100.0));
-
- tab_joint_text(self->t,5,1,6,1,TAB_CENTER,
- ds.string);
-
+ tab_joint_text(self->t,5,1,6,1,TAB_CENTER, ds.string);
ds_destroy(&ds);
-
tab_vline(self->t,TAL_0,6,1,1);
tab_hline(self->t,TAL_1,5,6,2);
-
-
tab_text (self->t, 1, 2, TAB_CENTER | TAT_TITLE, _("t"));
tab_text (self->t, 2, 2, TAB_CENTER | TAT_TITLE, _("df"));
tab_text (self->t, 3, 2, TAB_CENTER | TAT_TITLE, _("Sig. (2-tailed)"));
tab_text (self->t, 5, 2, TAB_CENTER | TAT_TITLE, _("Lower"));
tab_text (self->t, 6, 2, TAB_CENTER | TAT_TITLE, _("Upper"));
-
}
-
+/* Populate the one sample trbox */
void
-trbox_one_sample_populate(struct trbox *trb,
- struct cmd_t_test *cmd)
+trbox_one_sample_populate(struct trbox *trb, struct cmd_t_test *cmd)
{
int i;
for (i=0; i < cmd->n_variables; ++i)
{
- tab_text (trb->t, 0, i+3,
- TAB_LEFT, cmd->v_variables[i]->name);
+ int which =1;
+ double t;
+ double p,q;
+ double df;
+ int status;
+ double bound;
+ struct t_test_proc *ttp;
+ ttp= &cmd->v_variables[i]->p.t_t;
+
+
+ tab_text (trb->t, 0, i+3, TAB_LEFT, cmd->v_variables[i]->name);
+
+ t = (ttp->mean - cmd->n_testval ) * sqrt(ttp->n) / ttp->std_dev ;
+
+ tab_float (trb->t, 1, i+3, TAB_RIGHT, t, 8,3);
+
+ /* degrees of freedom */
+ df = ttp->n - 1;
+
+ tab_float (trb->t, 2, i+3, TAB_RIGHT, df, 8,0);
+
+ cdft(&which, &p, &q, &t, &df, &status, &bound);
+
+ if ( 0 != status )
+ {
+ msg( SE, _("Error calculating T statistic (cdft returned %d)."),status);
+ }
+
+
+ /* Multiply by 2 to get 2-tailed significance */
+ tab_float (trb->t, 3, i+3, TAB_RIGHT, q*2.0, 8,3);
+
+ tab_float (trb->t, 4, i+3, TAB_RIGHT, ttp->mean_diff, 8,3);
+
+
+ q = (1 - cmd->criteria)/2.0; /* 2-tailed test */
+ p = 1 - q ;
+ which=2; /* Calc T from p,q and df */
+ cdft(&which, &p, &q, &t, &df, &status, &bound);
+ if ( 0 != status )
+ {
+ msg( SE, _("Error calculating T statistic (cdft returned %d)."),status);
+ }
+
+ tab_float (trb->t, 5, i+3, TAB_RIGHT,
+ ttp->mean_diff - t * ttp->se_mean, 8,4);
+
+ tab_float (trb->t, 6, i+3, TAB_RIGHT,
+ ttp->mean_diff + t * ttp->se_mean, 8,4);
}
-
}
-
+/* Base initializer for the generalized trbox */
void
-trbox_base_init(struct trbox *self, int data_rows,int cols)
+trbox_base_init(struct trbox *self, int data_rows, int cols)
{
- const int rows=3+data_rows;
+ const int rows = 3 + data_rows;
self->finalize = trbox_base_finalize;
self->t = tab_create (cols, rows, 0);
+ tab_headers (self->t,0,0,3,0);
+ tab_box (self->t, TAL_2, TAL_2, TAL_0, TAL_0, 0, 0, cols -1, rows -1);
+ tab_hline(self->t, TAL_2,0,cols-1,3);
+ tab_dim (self->t, tab_natural_dimensions);
+}
- tab_headers (self->t,0,0,3,0);
+/* Base finalizer for the trbox */
+void
+trbox_base_finalize(struct trbox *trb)
+{
+ tab_submit(trb->t);
+}
- tab_box (self->t, TAL_2, TAL_2, TAL_0, TAL_0, 0, 0, cols -1, rows -1);
+/* Create , populate and submit the Paired Samples Correlation box */
+void
+pscbox(struct cmd_t_test *cmd)
+{
+ const int rows=1+n_pairs;
+ const int cols=5;
+ int i;
+
+ struct tab_table *table;
+
+ table = tab_create (cols,rows,0);
+
+ tab_columns (table, SOM_COL_DOWN, 1);
+ tab_headers (table,0,0,1,0);
+ tab_box (table, TAL_2, TAL_2, TAL_0, TAL_1, 0, 0, cols -1, rows -1 );
+ tab_hline(table, TAL_2, 0, cols - 1, 1);
+ tab_vline(table, TAL_2, 2, 0, rows - 1);
+ tab_dim(table, tab_natural_dimensions);
+ tab_title(table, 0, _("Paired Samples Correlations"));
+
+ /* column headings */
+ tab_text(table, 2,0, TAB_CENTER | TAT_TITLE, _("N"));
+ tab_text(table, 3,0, TAB_CENTER | TAT_TITLE, _("Correlation"));
+ tab_text(table, 4,0, TAB_CENTER | TAT_TITLE, _("Sig."));
+
+ /* row headings */
+ {
+ struct string ds;
- tab_hline(self->t, TAL_2,0,cols-1,3);
+ ds_init(t_test_pool,&ds,15);
- tab_dim (self->t, tab_natural_dimensions);
+ for (i=0; i < n_pairs; ++i)
+ {
+ ds_clear(&ds);
+ ds_printf(&ds,_("Pair %d"),i);
+ tab_text(table, 0,i+1, TAB_LEFT | TAT_TITLE, ds.string);
+
+ ds_clear(&ds);
+ ds_printf(&ds,_("%s & %s"),pairs[i][0]->name,pairs[i][1]->name);
+ tab_text(table, 1,i+1, TAB_LEFT | TAT_TITLE, ds.string);
+ }
+
+ ds_destroy(&ds);
+ }
+
+ tab_submit(table);
}
+
+/* Calculation Implementation */
+
+/* Per case calculations common to all variants of the T test */
+static int
+common_calc (struct ccase *c)
+{
+ int i;
+
+ double weight = dict_get_case_weight(default_dict,c);
+
+ for(i=0; i< cmd.n_variables ; ++i)
+ {
+ struct t_test_proc *ttp;
+ struct variable *v = cmd.v_variables[i];
+ union value *val = &c->data[v->fv];
+
+ ttp= &cmd.v_variables[i]->p.t_t;
+
+ if (val->f != SYSMIS)
+ {
+ ttp->n+=weight;
+ ttp->sum+=weight * val->f;
+ ttp->ssq+=weight * val->f * val->f;
+ }
+ }
+ return 0;
+}
+
+/* Pre calculations common to all variants of the T test */
+static void
+common_precalc (void)
+{
+ int i=0;
+
+ for(i=0; i< cmd.n_variables ; ++i)
+ {
+ struct t_test_proc *ttp;
+ ttp= &cmd.v_variables[i]->p.t_t;
+
+ ttp->sum=0;
+ ttp->n=0;
+ ttp->ssq=0;
+ ttp->sum_diff=0;
+ }
+}
+
+/* Post calculations common to all variants of the T test */
void
-trbox_base_finalize(struct trbox *trb)
+common_postcalc (void)
{
- tab_submit(trb->t);
+ int i=0;
+
+ for(i=0; i< cmd.n_variables ; ++i)
+ {
+ struct t_test_proc *ttp;
+ ttp= &cmd.v_variables[i]->p.t_t;
+
+ ttp->mean=ttp->sum / ttp->n;
+ ttp->std_dev= sqrt(
+ ttp->n/(ttp->n-1) *
+ ( (ttp->ssq / ttp->n ) - ttp->mean * ttp->mean )
+ ) ;
+
+ ttp->se_mean = ttp->std_dev / sqrt(ttp->n);
+
+ ttp->mean_diff= ttp->sum_diff / ttp->n;
+ }
+}
+
+/* Per case calculations for one sample t test */
+static int
+one_sample_calc (struct ccase *c)
+{
+ int i;
+
+ double weight = dict_get_case_weight(default_dict,c);
+
+ for(i=0; i< cmd.n_variables ; ++i)
+ {
+ struct t_test_proc *ttp;
+ struct variable *v = cmd.v_variables[i];
+ union value *val = &c->data[v->fv];
+
+ ttp= &cmd.v_variables[i]->p.t_t;
+
+ if (val->f != SYSMIS)
+ ttp->sum_diff += weight * (val->f - cmd.n_testval);
+ }
+
+ return 0;
+}
+
+/* Pre calculations for one sample t test */
+static void
+one_sample_precalc (void)
+{
+ int i=0;
+
+ for(i=0; i< cmd.n_variables ; ++i)
+ {
+ struct t_test_proc *ttp;
+ ttp= &cmd.v_variables[i]->p.t_t;
+
+ ttp->sum_diff=0;
+ }
+}
+
+/* Post calculations for one sample t test */
+static void
+one_sample_postcalc (void)
+{
+ int i=0;
+
+ for(i=0; i< cmd.n_variables ; ++i)
+ {
+ struct t_test_proc *ttp;
+ ttp= &cmd.v_variables[i]->p.t_t;
+
+
+ ttp->mean_diff = ttp->sum_diff / ttp->n ;
+ }
}
projects / pspp-builds.git / blobdiff