Free easy way to draw graphs and charts in C

Question

I am doing a little exploring simulation and I want to show the graphs to compare the performance among the algorithms during run-time   What library comes to your mind  I highly prefer those that come small as I d love if it s easy for my instructor to compile my code  I ve checked gdchart but it seems to be too heavy  I just want a simple x-y sort of timeline graph   Google chart is of course out of the question  in case you ve read this similar question     Related post Scatter Plots in C

User · Accepted Answer

My favourite has always been gnuplot  It s very extensive  so it might be a bit too complex for your needs though  It is cross-platform and there is a C   API

User · Answer

Cern s ROOT produces some pretty nice stuff  I use it to display Neural Network data a lot

User · Answer

Honestly  I was in the same boat as you  I ve got a C   Library that I wanted to connect to a graphing utility  I ended up using Boost Python and matplotlib  It was the best one that I could find   As a side note  I was also wary of licensing  matplotlib and the boost libraries can be integrated into proprietary applications   Here s an example of the code that I used    include  lt boost python hpp gt   include  lt pygtk pygtk h gt   include  lt gtkmm h gt   using namespace boost  python  using namespace std      This is called in the idle loop  bool update object  axes  object  canvas        static object random integers   object handle lt  gt  PyImport ImportModule  numpy random     attr  random integers        axes- gt attr  scatter   random integers 0 1000 1000   random integers 0 1000 1000        axes- gt attr  set xlim   0 1000       axes- gt attr  set ylim   0 1000       canvas- gt attr  draw          return true     int main         try              Python startup code         Py Initialize            PyRun SimpleString  import signal            PyRun SimpleString  signal signal signal SIGINT  signal SIG DFL                 Normal Gtk startup code         Gtk  Main kit 0 0               Get the python Figure and FigureCanvas types          object Figure   object handle lt  gt  PyImport ImportModule  matplotlib figure     attr  Figure            object FigureCanvas   object handle lt  gt  PyImport ImportModule  matplotlib backends backend gtkagg     attr  FigureCanvasGTKAgg                Instantiate a canvas         object figure   Figure            object canvas   FigureCanvas figure           object axes   figure attr  add subplot   111           axes attr  hold   false               Create our window          Gtk  Window window          window set title  Engineering Sample            window set default size 1000  600               Grab the Gtk  DrawingArea from the canvas          Gtk  DrawingArea  plot   Glib  wrap GTK DRAWING AREA pygobject get canvas ptr                   Add the plot to the window          window add  plot           window show all                On the idle loop  we ll call update axes  canvas           Glib  signal idle   connect sigc  bind  amp update   amp axes   amp canvas                And start the Gtk event loop          Gtk  Main  run window          catch  error already set             PyErr Print

User · Answer

I ve used this  portable plotter   It s very small  multiplatform  easy to use and you can plug it into different graphical libraries  pplot   Only for the plots part   If you use or plan to use Qt  another multiplatform solution is Qwt and Qchart

[c++] Free easy way to draw graphs and charts in C++?

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