lsst.jointcal  21.0.0-20-g3b2d1f0+e3c73eff9e
Histo2d.cc
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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 <iostream>
26 #include <cmath>
27 #include <string.h> /* for memset*/
28 
29 #include "lsst/log/Log.h"
30 #include "lsst/jointcal/Histo2d.h"
31 
32 namespace {
33 LOG_LOGGER _log = LOG_GET("jointcal.Histo2d");
34 }
35 
36 namespace lsst {
37 namespace jointcal {
38 
39 Histo2d::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 
58 Histo2d::Histo2d(const Histo2d &other) {
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 
68 bool 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 
75 void 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 
80 double 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 
97 void Histo2d::zeroBin(double x, double y) {
98  int ix, iy;
99  if (indices(x, y, ix, iy)) data[iy + ny * ix] = 0;
100 }
101 
102 double 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
char * data
afw::table::Key< double > weight
#define LOGL_WARN(logger, message...)
#define LOG_GET(logger)
double x
int y
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)
Class for a simple mapping implementing a generic AstrometryTransform.
T size(T... args)