A Discrete-Event Network Simulator
API
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gnuplot-example.cc
Go to the documentation of this file.
1/*
2 * Copyright (c) 2011 University of Washington
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation;
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 *
17 * Author: Mitch Watrous (watrous@u.washington.edu)
18 */
19
20#include "ns3/gnuplot.h"
21
22#include <fstream>
23
24using namespace ns3;
25
26namespace
27{
28
32void
34{
35 std::string fileNameWithNoExtension = "plot-2d";
36 std::string graphicsFileName = fileNameWithNoExtension + ".png";
37 std::string plotFileName = fileNameWithNoExtension + ".plt";
38 std::string plotTitle = "2-D Plot";
39 std::string dataTitle = "2-D Data";
40
41 // Instantiate the plot and set its title.
42 Gnuplot plot(graphicsFileName);
43 plot.SetTitle(plotTitle);
44
45 // Make the graphics file, which the plot file will create when it
46 // is used with Gnuplot, be a PNG file.
47 plot.SetTerminal("png");
48
49 // Set the labels for each axis.
50 plot.SetLegend("X Values", "Y Values");
51
52 // Set the range for the x axis.
53 plot.AppendExtra("set xrange [-6:+6]");
54
55 // Instantiate the dataset, set its title, and make the points be
56 // plotted along with connecting lines.
57 Gnuplot2dDataset dataset;
58 dataset.SetTitle(dataTitle);
60
61 double x;
62 double y;
63
64 // Create the 2-D dataset.
65 for (x = -5.0; x <= +5.0; x += 1.0)
66 {
67 // Calculate the 2-D curve
68 //
69 // 2
70 // y = x .
71 //
72 y = x * x;
73
74 // Add this point.
75 dataset.Add(x, y);
76 }
77
78 // Add the dataset to the plot.
79 plot.AddDataset(dataset);
80
81 // Open the plot file.
82 std::ofstream plotFile(plotFileName);
83
84 // Write the plot file.
85 plot.GenerateOutput(plotFile);
86
87 // Close the plot file.
88 plotFile.close();
89}
90
94void
96{
97 std::string fileNameWithNoExtension = "plot-2d-with-error-bars";
98 std::string graphicsFileName = fileNameWithNoExtension + ".png";
99 std::string plotFileName = fileNameWithNoExtension + ".plt";
100 std::string plotTitle = "2-D Plot With Error Bars";
101 std::string dataTitle = "2-D Data With Error Bars";
102
103 // Instantiate the plot and set its title.
104 Gnuplot plot(graphicsFileName);
105 plot.SetTitle(plotTitle);
106
107 // Make the graphics file, which the plot file will create when it
108 // is used with Gnuplot, be a PNG file.
109 plot.SetTerminal("png");
110
111 // Set the labels for each axis.
112 plot.SetLegend("X Values", "Y Values");
113
114 // Set the range for the x axis.
115 plot.AppendExtra("set xrange [-6:+6]");
116
117 // Instantiate the dataset, set its title, and make the points be
118 // plotted with no connecting lines.
119 Gnuplot2dDataset dataset;
120 dataset.SetTitle(dataTitle);
122
123 // Make the dataset have error bars in both the x and y directions.
125
126 double x;
127 double xErrorDelta;
128 double y;
129 double yErrorDelta;
130
131 // Create the 2-D dataset.
132 for (x = -5.0; x <= +5.0; x += 1.0)
133 {
134 // Calculate the 2-D curve
135 //
136 // 2
137 // y = x .
138 //
139 y = x * x;
140
141 // Make the uncertainty in the x direction be constant and make
142 // the uncertainty in the y direction be a constant fraction of
143 // y's value.
144 xErrorDelta = 0.25;
145 yErrorDelta = 0.1 * y;
146
147 // Add this point with uncertainties in both the x and y
148 // direction.
149 dataset.Add(x, y, xErrorDelta, yErrorDelta);
150 }
151
152 // Add the dataset to the plot.
153 plot.AddDataset(dataset);
154
155 // Open the plot file.
156 std::ofstream plotFile(plotFileName);
157
158 // Write the plot file.
159 plot.GenerateOutput(plotFile);
160
161 // Close the plot file.
162 plotFile.close();
163}
164
168void
170{
171 std::string fileNameWithNoExtension = "plot-3d";
172 std::string graphicsFileName = fileNameWithNoExtension + ".png";
173 std::string plotFileName = fileNameWithNoExtension + ".plt";
174 std::string plotTitle = "3-D Plot";
175 std::string dataTitle = "3-D Data";
176
177 // Instantiate the plot and set its title.
178 Gnuplot plot(graphicsFileName);
179 plot.SetTitle(plotTitle);
180
181 // Make the graphics file, which the plot file will create when it
182 // is used with Gnuplot, be a PNG file.
183 plot.SetTerminal("png");
184
185 // Rotate the plot 30 degrees around the x axis and then rotate the
186 // plot 120 degrees around the new z axis.
187 plot.AppendExtra("set view 30, 120, 1.0, 1.0");
188
189 // Make the zero for the z-axis be in the x-axis and y-axis plane.
190 plot.AppendExtra("set ticslevel 0");
191
192 // Set the labels for each axis.
193 plot.AppendExtra("set xlabel \"X Values\"");
194 plot.AppendExtra("set ylabel \"Y Values\"");
195 plot.AppendExtra("set zlabel \"Z Values\"");
196
197 // Set the ranges for the x and y axis.
198 plot.AppendExtra("set xrange [-5:+5]");
199 plot.AppendExtra("set yrange [-5:+5]");
200
201 // Instantiate the dataset, set its title, and make the points be
202 // connected by lines.
203 Gnuplot3dDataset dataset;
204 dataset.SetTitle(dataTitle);
205 dataset.SetStyle("with lines");
206
207 double x;
208 double y;
209 double z;
210
211 // Create the 3-D dataset.
212 for (x = -5.0; x <= +5.0; x += 1.0)
213 {
214 for (y = -5.0; y <= +5.0; y += 1.0)
215 {
216 // Calculate the 3-D surface
217 //
218 // 2 2
219 // z = x * y .
220 //
221 z = x * x * y * y;
222
223 // Add this point.
224 dataset.Add(x, y, z);
225 }
226
227 // The blank line is necessary at the end of each x value's data
228 // points for the 3-D surface grid to work.
229 dataset.AddEmptyLine();
230 }
231
232 // Add the dataset to the plot.
233 plot.AddDataset(dataset);
234
235 // Open the plot file.
236 std::ofstream plotFile(plotFileName);
237
238 // Write the plot file.
239 plot.GenerateOutput(plotFile);
240
241 // Close the plot file.
242 plotFile.close();
243}
244
245} // unnamed namespace
246
247int
248main(int argc, char* argv[])
249{
250 // Create a 2-D plot file.
252
253 // Create a 2-D plot with error bars file.
255
256 // Create a 3-D plot file.
258
259 return 0;
260}
Class to represent a 2D points plot.
Definition: gnuplot.h:116
void SetErrorBars(ErrorBars errorBars)
Definition: gnuplot.cc:371
void SetStyle(Style style)
Definition: gnuplot.cc:359
void Add(double x, double y)
Definition: gnuplot.cc:377
Class to represent a 3D points plot.
Definition: gnuplot.h:272
void AddEmptyLine()
Add an empty line in the data output sequence.
Definition: gnuplot.cc:633
void Add(double x, double y, double z)
Definition: gnuplot.cc:622
void SetStyle(const std::string &style)
Definition: gnuplot.cc:616
void SetTitle(const std::string &title)
Change line title.
Definition: gnuplot.cc:148
a simple class to generate gnuplot-ready plotting commands from a set of datasets.
Definition: gnuplot.h:370
void AddDataset(const GnuplotDataset &dataset)
Definition: gnuplot.cc:796
void SetLegend(const std::string &xLegend, const std::string &yLegend)
Definition: gnuplot.cc:776
void SetTerminal(const std::string &terminal)
Definition: gnuplot.cc:764
void AppendExtra(const std::string &extra)
Definition: gnuplot.cc:789
void GenerateOutput(std::ostream &os)
Writes gnuplot commands and data values to a single output stream.
Definition: gnuplot.cc:802
void SetTitle(const std::string &title)
Definition: gnuplot.cc:770
void Create2DPlotWithErrorBarsFile()
This function creates a 2-D plot with error bars file.
void Create3DPlotFile()
This function creates a 3-D plot file.
void Create2DPlotFile()
This function creates a 2-D plot file.
Every class exported by the ns3 library is enclosed in the ns3 namespace.