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    <p>You could also use <a href="http://www.gnuplot.info/" rel="nofollow noreferrer"><strong>Gnuplot</strong></a>, an interactive plotting program: your C++ code handles and computes your data, and then it can export the result to a file or the standard output that can be processed by Gnuplot. For instance, you can do something like this:</p> <blockquote> <pre><code>my_program | gnuplot </code></pre> </blockquote> <p>which will call Gnuplot with the result of your program.</p> <p>Gnuplot is very powerful, you can check the <a href="http://gnuplot.sourceforge.net/demo_cvs/" rel="nofollow noreferrer">examples available here</a>.</p> <p><a href="http://gnuplot.sourceforge.net/demo_cvs/heatmaps.3.png" rel="nofollow noreferrer">Gnuplot output example http://gnuplot.sourceforge.net/demo_cvs/heatmaps.3.png</a></p> <p>You can find additional information on Gnuplot in C/C++ here:</p> <p><a href="https://stackoverflow.com/questions/4445720/how-to-plot-graphs-in-gnuplot-in-real-time-in-c?rq=1"><strong>How to plot graphs in Gnuplot in Real time in C++?</strong></a></p> <h3>UPDATE</h3> <p>Another possibility is to use <a href="http://www.r-project.org/" rel="nofollow noreferrer"><strong>R</strong></a>. This language is very famous among statisticians. You may want to look at <a href="http://www.rexamples.com/" rel="nofollow noreferrer">some examples</a>.</p> <p><img src="https://i.stack.imgur.com/DuzF9.jpg" alt="R output example"></p> <p>Related question: <a href="https://stackoverflow.com/questions/10176468/how-to-run-plot-of-r-into-c-c"><strong>How to run plot of R into C/C++?</strong></a></p>
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    1. POHow to draw functions in C++
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    1. COThanks for the tip. I wanted to follw the examples in the book but this looks like a wondeful solution for the future.
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    2. CO@ BenC Yes, along with ROOT, it is the best choice, so I decided to begin to explore both and to use which is the best for every task I need. How can I begin ? How can install it ? Any easy tutorials ?
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    3. COYou can check [**this tutorial**](http://physicspmb.ukzn.ac.za/index.php/Gnuplot_tutorial). After that, it really depends on what you are trying to plot. Install is straightforward. If you're using Windows, [**this**](http://www.maths.manchester.ac.uk/~pjohnson/Gnuplot/windows_gnuplot.html) might help you (I only used it on Linux).
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