src/cal/histo.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 * Compute a histogram from input data
 *
 *      9/5/96  Greg Ward
 */

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <ctype.h>

#define MAXCOL          64              /* maximum number of input columns */
#define MAXDIV          1024

#define isint(x)        (floor((x)+1e-6) != floor((x)-1e-6))

char    *progname;

int     cumulative = 0;

long    histo[MAXCOL][MAXDIV];
double  minv, maxv;
int     ndiv;

int     ncols;


main(argc, argv)
int     argc;
char    *argv[];
{
        progname = argv[0];
        if (argc > 1 && !strcmp(argv[1], "-c")) {
                cumulative++;
                argc--; argv++;
        }
        if (argc < 3)
                goto userr;
        minv = atof(argv[1]);
        maxv = atof(argv[2]);
        if (argc == 4)
                ndiv = atoi(argv[3]);
        else {
                if (argc > 4 || !isint(minv) || !isint(maxv))
                        goto userr;
                maxv += 0.5;
                minv -= 0.5;
                ndiv = maxv - minv + 0.5;
        }
        if (minv >= maxv | ndiv <= 0)
                goto userr;
        if (ndiv > MAXDIV) {
                fprintf(stderr, "%s: maximum number of divisions: %d\n",
                                progname, MAXDIV);
                goto userr;
        }
        readinp();
        if (cumulative)
                printcumul();
        else
                printhisto();
        exit(0);
userr:
        fprintf(stderr, "Usage: %s [-c] min max n\n", progname);
        fprintf(stderr, "   Or: %s [-c] imin imax\n", progname);
        exit(1);
}


readinp()                       /* gather statistics on input */
{
        char    buf[16*MAXCOL];
        double  d;
        register int    c;
        register char   *cp;

        while ((cp = fgets(buf, sizeof(buf), stdin)) != NULL) {
                for (c = 0; c < MAXCOL; c++) {
                        while (isspace(*cp))
                                cp++;
                        if (!*cp)
                                break;
                        d = atof(cp);
                        while (*cp && !isspace(*cp))
                                cp++;
                        if (d >= minv && d < maxv)
                                histo[c][(int)(ndiv*(d-minv)/(maxv-minv))]++;
                }
                if (c > ncols)
                        ncols = c;
        }
}


printcumul()                    /* print cumulative histogram results */
{
        long            ctot[MAXCOL];
        register int    i, c;

        for (c = ncols; c--; )
                ctot[c] = 0L;

        for (i = 0; i < ndiv; i++) {
                printf("%g", minv + (maxv-minv)*(i+1)/ndiv);
                for (c = 0; c < ncols; c++) {
                        ctot[c] += histo[c][i];
                        printf("\t%ld", ctot[c]);
                }
                putchar('\n');
        }
}


printhisto()                    /* print histogram results */
{
        register int    i, c;

        for (i = 0; i < ndiv; i++) {
                printf("%g", minv + (maxv-minv)*(i+.5)/ndiv);
                for (c = 0; c < ncols; c++)
                        printf("\t%ld", histo[c][i]);
                putchar('\n');
        }
}
Revision:	1.1
Committed:	Sat Feb 22 02:07:20 2003 UTC (21 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R5
Log Message:	Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
#	Content
1	#ifndef lint
2	static const char RCSid[] = "$Id$";
3	#endif
4	/*
5	* Compute a histogram from input data
6	*
7	* 9/5/96 Greg Ward
8	*/
9
10	#include <stdio.h>
11	#include <stdlib.h>
12	#include <math.h>
13	#include <ctype.h>
14
15	#define MAXCOL 64 /* maximum number of input columns */
16	#define MAXDIV 1024
17
18	#define isint(x) (floor((x)+1e-6) != floor((x)-1e-6))
19
20	char *progname;
21
22	int cumulative = 0;
23
24	long histo[MAXCOL][MAXDIV];
25	double minv, maxv;
26	int ndiv;
27
28	int ncols;
29
30
31	main(argc, argv)
32	int argc;
33	char *argv[];
34	{
35	progname = argv[0];
36	if (argc > 1 && !strcmp(argv[1], "-c")) {
37	cumulative++;
38	argc--; argv++;
39	}
40	if (argc < 3)
41	goto userr;
42	minv = atof(argv[1]);
43	maxv = atof(argv[2]);
44	if (argc == 4)
45	ndiv = atoi(argv[3]);
46	else {
47	if (argc > 4 \|\| !isint(minv) \|\| !isint(maxv))
48	goto userr;
49	maxv += 0.5;
50	minv -= 0.5;
51	ndiv = maxv - minv + 0.5;
52	}
53	if (minv >= maxv \| ndiv <= 0)
54	goto userr;
55	if (ndiv > MAXDIV) {
56	fprintf(stderr, "%s: maximum number of divisions: %d\n",
57	progname, MAXDIV);
58	goto userr;
59	}
60	readinp();
61	if (cumulative)
62	printcumul();
63	else
64	printhisto();
65	exit(0);
66	userr:
67	fprintf(stderr, "Usage: %s [-c] min max n\n", progname);
68	fprintf(stderr, " Or: %s [-c] imin imax\n", progname);
69	exit(1);
70	}
71
72
73	readinp() /* gather statistics on input */
74	{
75	char buf[16*MAXCOL];
76	double d;
77	register int c;
78	register char *cp;
79
80	while ((cp = fgets(buf, sizeof(buf), stdin)) != NULL) {
81	for (c = 0; c < MAXCOL; c++) {
82	while (isspace(*cp))
83	cp++;
84	if (!*cp)
85	break;
86	d = atof(cp);
87	while (cp && !isspace(cp))
88	cp++;
89	if (d >= minv && d < maxv)
90	histo[c][(int)(ndiv*(d-minv)/(maxv-minv))]++;
91	}
92	if (c > ncols)
93	ncols = c;
94	}
95	}
96
97
98	printcumul() /* print cumulative histogram results */
99	{
100	long ctot[MAXCOL];
101	register int i, c;
102
103	for (c = ncols; c--; )
104	ctot[c] = 0L;
105
106	for (i = 0; i < ndiv; i++) {
107	printf("%g", minv + (maxv-minv)*(i+1)/ndiv);
108	for (c = 0; c < ncols; c++) {
109	ctot[c] += histo[c][i];
110	printf("\t%ld", ctot[c]);
111	}
112	putchar('\n');
113	}
114	}
115
116
117	printhisto() /* print histogram results */
118	{
119	register int i, c;
120
121	for (i = 0; i < ndiv; i++) {
122	printf("%g", minv + (maxv-minv)*(i+.5)/ndiv);
123	for (c = 0; c < ncols; c++)
124	printf("\t%ld", histo[c][i]);
125	putchar('\n');
126	}
127	}