/* PSPP - a program for statistical analysis.
- Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2008, 2009, 2011 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
-#include "percentiles.h"
-#include <math/order-stats.h>
+#include "math/percentiles.h"
+
+#include "data/casereader.h"
+#include "data/val-type.h"
+#include "data/variable.h"
+#include "libpspp/assertion.h"
+#include "libpspp/cast.h"
+#include "math/order-stats.h"
+
+#include "gl/xalloc.h"
#include "gettext.h"
#define _(msgid) gettext (msgid)
#define N_(msgid) msgid
-#include <libpspp/assertion.h>
-#include <data/val-type.h>
-#include <gl/xalloc.h>
-#include <data/variable.h>
-#include <data/casereader.h>
-
-
-const char *const ptile_alg_desc[] = {
- "",
- N_("HAverage"),
- N_("Weighted Average"),
- N_("Rounded"),
- N_("Empirical"),
- N_("Empirical with averaging")
-};
-
-
-
double
percentile_calculate (const struct percentile *ptl, enum pc_alg alg)
{
- struct percentile *mutable = (struct percentile *) ptl;
+ struct percentile *mutable = CONST_CAST (struct percentile *, ptl);
const struct order_stats *os = &ptl->parent;
- assert (os->cc == ptl->w);
-
- if ( ptl->g1 == SYSMIS)
+ if (ptl->g1 == SYSMIS)
mutable->g1 = (os->k[0].tc - os->k[0].cc) / os->k[0].c_p1;
- if ( ptl->g1_star == SYSMIS)
+ if (ptl->g1_star == SYSMIS)
mutable->g1_star = os->k[0].tc - os->k[0].cc;
- if ( ptl->g2 == SYSMIS)
+ if (ptl->g2 == SYSMIS)
{
- if ( os->k[1].c == 0 )
+ if (os->k[1].c == 0)
mutable->g2 = os->k[1].tc / os->k[1].c_p1;
- else if ( os->k[1].c_p1 == 0 )
+ else if (os->k[1].c_p1 == 0)
mutable->g2 = 0;
else
mutable->g2 = (os->k[1].tc - os->k[1].cc) / os->k[1].c_p1;
}
- if ( ptl->g2_star == SYSMIS)
+ if (ptl->g2_star == SYSMIS)
{
- if ( os->k[1].c == 0 )
+ if (os->k[1].c == 0)
mutable->g2_star = os->k[1].tc;
- else if ( os->k[1].c_p1 == 0 )
+ else if (os->k[1].c_p1 == 0)
mutable->g2_star = 0;
else
mutable->g2_star = os->k[1].tc - os->k[1].cc;
switch (alg)
{
case PC_WAVERAGE:
- if ( ptl->g1_star >= 1.0)
+ if (ptl->g1_star >= 1.0)
return os->k[0].y_p1;
else
{
- double a = ( os->k[0].y == SYSMIS ) ? 0 : os->k[0].y;
+ double a = (os->k[0].y == SYSMIS) ? 0 : os->k[0].y;
if (os->k[0].c_p1 >= 1.0)
return (1 - ptl->g1_star) * a + ptl->g1_star * os->k[0].y_p1;
case PC_ROUND:
{
- double a = ( os->k[0].y == SYSMIS ) ? 0 : os->k[0].y;
+ double a = (os->k[0].y == SYSMIS) ? 0 : os->k[0].y;
if (os->k[0].c_p1 >= 1.0)
return (ptl->g1_star < 0.5) ? a : os->k[0].y_p1;
break;
case PC_EMPIRICAL:
- if ( ptl->g1_star == 0 )
+ if (ptl->g1_star == 0)
return os->k[0].y;
else
return os->k[0].y_p1;
break;
case PC_HAVERAGE:
- if ( ptl->g2_star >= 1.0)
+ if (ptl->g2_star >= 1.0)
{
return os->k[1].y_p1;
}
else
{
- double a = ( os->k[1].y == SYSMIS ) ? 0 : os->k[1].y;
+ double a = (os->k[1].y == SYSMIS) ? 0 : os->k[1].y;
- if ( os->k[1].c_p1 >= 1.0)
+ if (os->k[1].c_p1 >= 1.0)
{
- if ( ptl->g2_star == 0)
+ if (ptl->g2_star == 0)
return os->k[1].y;
return (1 - ptl->g2_star) * a + ptl->g2_star * os->k[1].y_p1;
break;
case PC_AEMPIRICAL:
- if ( ptl->g1_star == 0 )
+ if (ptl->g1_star == 0)
return (os->k[0].y + os->k[0].y_p1)/ 2.0;
else
return os->k[0].y_p1;
static void
destroy (struct statistic *stat)
{
- struct order_stats *os = (struct order_stats *) stat;
+ struct percentile *ptl = UP_CAST (stat, struct percentile, parent.parent);
+ struct order_stats *os = &ptl->parent;
free (os->k);
- free (os);
+ free (ptl);
}
ptl->w = W;
os->n_k = 2;
- os->k = xcalloc (sizeof (*os->k), 2);
+ os->k = xcalloc (2, sizeof (*os->k));
os->k[0].tc = W * p;
os->k[1].tc = (W + 1.0) * p;