Gnuplot in cpp - Revision history

MauroBrenna at 12:11, 4 November 2009

2009-11-04T12:11:44Z

MauroBrenna at 12:09, 4 November 2009

2009-11-04T12:09:40Z

MauroBrenna: How to plot using gnuplot in your C/C++ project

2009-11-04T12:02:00Z

How to plot using gnuplot in your C/C++ project

MauroBrenna at 12:01, 4 November 2009

2009-11-04T12:01:32Z

MauroBrenna at 11:54, 4 November 2009

2009-11-04T11:54:01Z

MauroBrenna at 11:53, 4 November 2009

2009-11-04T11:53:44Z

MauroBrenna at 11:53, 4 November 2009

2009-11-04T11:53:11Z

MauroBrenna: How to plot using gnuplot in your C/C++ project

2009-11-04T11:46:54Z

How to plot using gnuplot in your C/C++ project

New page

'''How to plot using gnuplot in your C/C++ programs'''

This is a little guide that shows you how you can add a plotting function in your C/C++ program.
This approach has some advantages and disadvantages:

PROS
- You don't need to write on files or similar and plot in a second moment through a Matlab/Octave/Gnuplot script

CONTRAS
- You don't have all the potentiality of Matlab/Octave plotting even if you can program your plotting utilities

'''HOW TO'''

# You should download gnuplot-cpp library. I suggest you to use my version LINKHERE because the official one [http://code.google.com/p/gnuplot-cpp/ gnuplot-cpp]has problems, (see below).
#To use the plotting library you should only need to include: "gnuplot-cpp/gnuplot_i.hpp"

@@ Line 14: / Line 14: @@
-# You should download gnuplot-cpp library. I suggest you to use my version [[Media:Gnuplot-cpp_modified.zip‎]] because the official one [http://code.google.com/p/gnuplot-cpp/ gnuplot-cpp] has problems, (see below).
+# You should download gnuplot-cpp library. I suggest you to use my version [[Media: Gnuplot-cpp_modified.zip‎]] because the official one [http://code.google.com/p/gnuplot-cpp/ gnuplot-cpp] has problems, (see below).
 #To use the plotting library you should only need to include: "gnuplot-cpp/gnuplot_i.hpp"
 # A code snippet is here presented that simply plots a 2D set of points:

@@ Line 14: / Line 14: @@
-# You should download gnuplot-cpp library. I suggest you to use my version LINKHERE because the official one [http://code.google.com/p/gnuplot-cpp/ gnuplot-cpp] has problems, (see below).
+# You should download gnuplot-cpp library. I suggest you to use my version [[Media:Gnuplot-cpp_modified.zip‎]] because the official one [http://code.google.com/p/gnuplot-cpp/ gnuplot-cpp] has problems, (see below).
 #To use the plotting library you should only need to include: "gnuplot-cpp/gnuplot_i.hpp"
 # A code snippet is here presented that simply plots a 2D set of points:

@@ Line 42: / Line 42: @@
 '''HOW IT WORKS'''
 For what I understood, the program writes a temp file (/tmp) in GNU/Linux and use it to plot in the correct way using [http://www.gnuplot.info/ Gnuplot].
 '''PROBLEM OF THE OFFICIAL VERSION'''
 Up to now (read the data of this post), the official package provided [http://code.google.com/p/gnuplot-cpp/ gnuplot-cpp] it has problems that deals with tempFiles. In many cases, for example in the destructor the function ''remove_tmpfiles()'' is commented. In this way many and many files are created in /tmp and after the max files limit is reached no other plots are created. Note that this could be useful if you want to save your points in a file for other processing.
 Moreover a major problem is due to the wrong use of the header file. Some functions are not inline and global constats are defined. These cause linking problems when you include official "gnuplot-cpp/gnuplot_i.hpp" in more than one source files.

@@ Line 14: / Line 14: @@
-# You should download gnuplot-cpp library. I suggest you to use my version LINKHERE because the official one [http://code.google.com/p/gnuplot-cpp/ gnuplot-cpp]has problems, (see below).
+# You should download gnuplot-cpp library. I suggest you to use my version LINKHERE because the official one [http://code.google.com/p/gnuplot-cpp/ gnuplot-cpp] has problems, (see below).
 #To use the plotting library you should only need to include: "gnuplot-cpp/gnuplot_i.hpp"
 # A code snippet is here presented that simply plots a 2D set of points:
@@ Line 40: / Line 40: @@
 </code>

@@ Line 25: / Line 25: @@
           // END GNUPLOT INITIALIZATION
           try {
              gp.remove_tmpfiles(); // it is always better to do it
              gp.reset_plot(); // delete the plot (like Matlab figure())

@@ Line 20: / Line 20: @@
      if(ANIMATIONON){
           // GNUPLOT
           // GNUPLOT INITIALIZATION
           Gnuplot gp("My plot");
@@ Line 38: / Line 37: @@
+          {
              cout << ge.what() << endl;
-−
+        }
-−
        } // END GNUPLOT
 </code>

← Older revision		Revision as of 11:53, 4 November 2009
Line 16:		Line 16:
	# You should download gnuplot-cpp library. I suggest you to use my version LINKHERE because the official one [http://code.google.com/p/gnuplot-cpp/ gnuplot-cpp]has problems, (see below).		# You should download gnuplot-cpp library. I suggest you to use my version LINKHERE because the official one [http://code.google.com/p/gnuplot-cpp/ gnuplot-cpp]has problems, (see below).
	#To use the plotting library you should only need to include: "gnuplot-cpp/gnuplot_i.hpp"		#To use the plotting library you should only need to include: "gnuplot-cpp/gnuplot_i.hpp"
		+	# A code snippet is here presented that simply plots a 2D set of points:
		+	<code>
		+	if(ANIMATIONON){
		+	// GNUPLOT
		+
		+	// GNUPLOT INITIALIZATION
		+	Gnuplot gp("My plot");
		+	//std::vector<double> x,y; // this are the vector containing (x,y) points
		+	// END GNUPLOT INITIALIZATION
		+	try {
		+
		+	gp.remove_tmpfiles(); // it is always better to do it
		+	gp.reset_plot(); // delete the plot (like Matlab figure())
		+	cout << endl << endl << "*** user-defined lists of points (x,y)" << endl;
		+	gp.set_grid();
		+	gp.set_style("points").plot_xy(x,y,"user-defined points 2d");
		+	//sleep(1);
		+	//usleep(3e5);
		+	}
		+	catch (GnuplotException ge)
		+	{
		+	cout << ge.what() << endl;
		+	}
		+
		+	} // END GNUPLOT
		+
		+	</code>