2 * Copyright © 2009 Keith Packard <keithp@keithp.com>
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; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 cc_timedata_convert(struct cc_timedata *d, double (*f)(double v, double a), double a)
24 struct cc_timedata *r;
27 r = calloc (1, sizeof (struct cc_timedata));
30 r->data = calloc (r->size, sizeof (struct cc_timedataelt));
31 r->time_offset = d->time_offset;
32 for (n = 0; n < d->num; n++) {
33 r->data[n].time = d->data[n].time;
34 r->data[n].value = f(d->data[n].value, a);
40 cc_timedata_integrate(struct cc_timedata *d, double min_time, double max_time)
42 struct cc_timedata *i;
46 cc_timedata_limits(d, min_time, max_time, &start, &stop);
47 i = calloc (1, sizeof (struct cc_timedata));
48 i->num = stop - start + 1;
50 i->data = calloc (i->size, sizeof (struct cc_timedataelt));
51 i->time_offset = d->data[start].time;
52 for (n = 0; n < i->num; n++) {
54 i->data[n].time = d->data[m].time;
58 i->data[n].value = i->data[n-1].value +
59 (d->data[m].value + d->data[m-1].value) / 2 *
60 ((d->data[m].time - d->data[m-1].time) / 100.0);
66 struct cc_perioddata *
67 cc_perioddata_differentiate(struct cc_perioddata *i)
69 struct cc_perioddata *d;
72 d = calloc (1, sizeof (struct cc_perioddata));
76 d->data = calloc (d->num, sizeof(double));
77 for (n = 1; n < d->num; n++)
78 d->data[n] = (i->data[n] - i->data[n-1]) / (i->step / 100.0);
79 d->data[0] = d->data[1];