wxFreeChart vs wxMathPlot

[b_grottier]

Hello,

I would like to create 2D charts : histogram, scatter diagrams... I am working with wxWidgets 2.9.1.

I noticed wxFreeChart and wxMathPlot among others. Which one do you use and why ? (I am looking for simple components.)

Thank you for your help.

Benoît

[evstevemd]

wxFreeChart. I have never used any of those but I think projet is well alive. I tried sometime ago and failed because there was no tutorial for beginners.

If you succeed with your project please take time to write jump start tutorial

[b_grottier]

I eventually chose wxFreeChart because I needed histograms. I do not think that wxMathPlot handles them.

I tried sometime ago and failed

Where did you fail exactly ? I do not have time to write a tutorial but I can help if needed.

Regards,

Benoît

[evstevemd]

I eventually chose wxFreeChart because I needed histograms. I do not think that wxMathPlot handles them.

I tried sometime ago and failed

Where did you fail exactly ? I do not have time to write a tutorial but I can help if needed.

Regards,

Benoît

Thanks Beno,
I wanted to write an app that ws to plot data in graphs and save as images from massive CSV files. I didn't knew which classes to use for plotting any graph. Its like, if let say you want to write wx program you create parent window (which is top level window) and then create an instance on wxApp derived class and there you are.

I was looking for same intro to wxFreeChart and I found none. Samples were too complex for me. I'll be happy to see few simple examples on how to draw histogram and something like O'give

Thanks

[b_grottier]

First of all, did you manage to build wxFreeChart ? Which OS do you use ? The readme file explains how to create the libraries. If you use Visual Studio, you will find in the build directory some VS projects to compile the libraries.

For the moment, I just defined my own panel based on an example provided with wxFreeChart:

Code: Select all

MyPanel::MyPanel(wxFrame *frame, int x, int y, int w, int h)
       : wxPanel( frame, wxID_ANY, wxPoint(x, y), wxSize(w, h) )
{
	wxBoxSizer * sz = new wxBoxSizer( wxVERTICAL ) ;


	// first serie data
	double data1[][2] = {
				{ 10, 20, },
				{ 13, 16, },
				{ 7, 30, },
				{ 15, 34, },
				{ 25, 4, },
		};
	
	// second serie data
	double data2[][2] = {
				{ 45, 40, },
				{ 23, 16, },
				{ 43, 60, },
				{ 25, 7, },
				{ 66, 4, },
		};

	// first step: create plot
	XYPlot *plot = new XYPlot();

	// create dataset
	XYSimpleDataset *dataset = new XYSimpleDataset();

	// and add to series to it
	dataset->AddSerie((double *) data1, WXSIZEOF(data1));
	dataset->AddSerie((double *) data2, WXSIZEOF(data2));

	// set line renderer with symbols enabled and lines disabled
	dataset->SetRenderer(new XYLineRenderer(true, false));
// add our dataset to plot
		plot->AddDataset(dataset);

		// create left and bottom number axes
		plot->AddAxis(new NumberAxis(AXIS_LEFT));
		plot->AddAxis(new NumberAxis(AXIS_BOTTOM));

		// link axes and dataset
		plot->LinkDataVerticalAxis(0, 0);
		plot->LinkDataHorizontalAxis(0, 0);

		// set serie names to be displayed on legend
		dataset->SetSerieName(0, wxT("First"));
		dataset->SetSerieName(1, wxT("Second"));

		// set legend to plot
		plot->SetLegend(new Legend(wxCENTER, wxRIGHT));

		wxChartPanel * m_chartPanel = new wxChartPanel(this);
		m_chartPanel->SetChart(new Chart(plot)) ;

		sz->Add(m_chartPanel, 1, wxEXPAND );

	SetSizerAndFit(sz) ;
}

I have not tried histograms yet. Nonetheless, I hope this will help you.

Benoît

[AUser]

I quite recommend mathgl (mathgl.sourceforge.net). Its pretty good, but you will need to build your own interaction widget.

[evstevemd]

First of all, did you manage to build wxFreeChart ? Which OS do you use ? The readme file explains how to create the libraries. If you use Visual Studio, you will find in the build directory some VS projects to compile the libraries.

For the moment, I just defined my own panel based on an example provided with wxFreeChart:

Code: Select all

MyPanel::MyPanel(wxFrame *frame, int x, int y, int w, int h)
       : wxPanel( frame, wxID_ANY, wxPoint(x, y), wxSize(w, h) )
{
	wxBoxSizer * sz = new wxBoxSizer( wxVERTICAL ) ;


	// first serie data
	double data1[][2] = {
				{ 10, 20, },
				{ 13, 16, },
				{ 7, 30, },
				{ 15, 34, },
				{ 25, 4, },
		};
	
	// second serie data
	double data2[][2] = {
				{ 45, 40, },
				{ 23, 16, },
				{ 43, 60, },
				{ 25, 7, },
				{ 66, 4, },
		};

	// first step: create plot
	XYPlot *plot = new XYPlot();

	// create dataset
	XYSimpleDataset *dataset = new XYSimpleDataset();

	// and add to series to it
	dataset->AddSerie((double *) data1, WXSIZEOF(data1));
	dataset->AddSerie((double *) data2, WXSIZEOF(data2));

	// set line renderer with symbols enabled and lines disabled
	dataset->SetRenderer(new XYLineRenderer(true, false));
// add our dataset to plot
		plot->AddDataset(dataset);

		// create left and bottom number axes
		plot->AddAxis(new NumberAxis(AXIS_LEFT));
		plot->AddAxis(new NumberAxis(AXIS_BOTTOM));

		// link axes and dataset
		plot->LinkDataVerticalAxis(0, 0);
		plot->LinkDataHorizontalAxis(0, 0);

		// set serie names to be displayed on legend
		dataset->SetSerieName(0, wxT("First"));
		dataset->SetSerieName(1, wxT("Second"));

		// set legend to plot
		plot->SetLegend(new Legend(wxCENTER, wxRIGHT));

		wxChartPanel * m_chartPanel = new wxChartPanel(this);
		m_chartPanel->SetChart(new Chart(plot)) ;

		sz->Add(m_chartPanel, 1, wxEXPAND );

	SetSizerAndFit(sz) ;
}

I have not tried histograms yet. Nonetheless, I hope this will help you.

Benoît

Compiling wasn't a problem.
Thanks for snippet. I will try in these few days AND i WILL POST BACK. (My Laptop is out for maintanance about a month. It got a serious screen bug )