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LSST Data Management Base Package
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Histo2d.cc
Go to the documentation of this file.
1// -*- LSST-C++ -*-
2/*
3 * This file is part of jointcal.
4 *
5 * Developed for the LSST Data Management System.
6 * This product includes software developed by the LSST Project
7 * (https://www.lsst.org).
8 * See the COPYRIGHT file at the top-level directory of this distribution
9 * for details of code ownership.
10 *
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <https://www.gnu.org/licenses/>.
23 */
24
25#include <cmath>
26#include <cstring> /* for memset*/
27#include <iostream>
28
29#include "lsst/log/Log.h"
31
32namespace {
33LOG_LOGGER _log = LOG_GET("lsst.jointcal.Histo2d");
34}
35
36namespace lsst {
37namespace jointcal {
38
39Histo2d::Histo2d(int nnx, float mminx, float mmaxx, int nny, float mminy, float mmaxy) : data(nnx * nny, 0.) {
40 nx = nnx;
41 ny = nny;
42 minx = mminx;
43 miny = mminy;
44 if (mmaxx != mminx)
45 scalex = nx / (mmaxx - mminx);
46 else {
47 LOGL_WARN(_log, "Histo2d: minx = maxx requested");
48 scalex = 1.0;
49 }
50 if (mmaxy != mminy)
51 scaley = ny / (mmaxy - mminy);
52 else {
53 LOGL_WARN(_log, "Histo2d: maxy = miny requested");
54 scaley = 1.0;
55 }
56}
57
59 data = other.data;
60 nx = other.nx;
61 ny = other.ny;
62 minx = other.minx;
63 miny = other.miny;
64 scalex = other.scalex;
65 scaley = other.scaley;
66}
67
68bool Histo2d::indices(double x, double y, int &ix, int &iy) const {
69 ix = (int)std::floor((x - minx) * scalex);
70 if (ix < 0 || ix >= nx) return false;
71 iy = (int)std::floor((y - miny) * scaley);
72 return (iy >= 0 && iy < ny);
73}
74
75void Histo2d::fill(float x, float y, float weight) {
76 int ix, iy;
77 if (indices(x, y, ix, iy)) data[iy + ny * ix] += weight;
78}
79
80double Histo2d::maxBin(double &x, double &y) const {
81 int imax = 0;
82 float valmax = -1e30;
83
84 for (std::size_t i = 0; i < data.size(); i++) {
85 if (data[i] > valmax) {
86 valmax = data[i];
87 imax = i;
88 }
89 }
90 int ix = imax / ny;
91 int iy = imax - ix * ny;
92 x = minx + ((float)ix + 0.5) / scalex;
93 y = miny + ((float)iy + 0.5) / scaley;
94 return valmax;
95}
96
97void Histo2d::zeroBin(double x, double y) {
98 int ix, iy;
99 if (indices(x, y, ix, iy)) data[iy + ny * ix] = 0;
100}
101
102double Histo2d::binContent(double x, double y) const {
103 int ix, iy;
104 if (indices(x, y, ix, iy)) return data[iy + ny * ix];
105 LOGL_WARN(_log, "Histo2D::binContent outside limits requested");
106 return -1e30;
107}
108} // namespace jointcal
109} // namespace lsst
LSST DM logging module built on log4cxx.
#define LOGL_WARN(logger, message...)
Log a warn-level message using a varargs/printf style interface.
Definition Log.h:547
#define LOG_GET(logger)
Returns a Log object associated with logger.
Definition Log.h:75
#define LOG_LOGGER
Definition Log.h:714
double maxBin(double &x, double &y) const
Definition Histo2d.cc:80
double binContent(double x, double y) const
Definition Histo2d.cc:102
void zeroBin(double x, double y)
Definition Histo2d.cc:97
void fill(float x, float y, float weight=1.)
Definition Histo2d.cc:75
T floor(T... args)