JKQtPlotter/examples/simpletest_impulsesplot
jkriege2 69ad2a0182 - added styling system for JKQTPlotter (+example app)
- improved documentation
- changed: using static const variables instead of \c #define for fixed default values (e.g. JKQTPImageTools::LUTSIZE, JKQTPImageTools::PALETTE_ICON_WIDTH, JKQTPlotterDrawinTools::ABS_MIN_LINEWIDTH, JKQTMathText::ABS_MIN_LINEWIDTH ...)
- new: added debugging option, which surrounds different regions with visible rectangles (JKQTBasePlotter::enableDebugShowRegionBoxes() )
- fixed: colorbars at top were positioned over the plot label
- new: frames (plot viewport, key/legend ...) may be rounded off at the corners
- new: diverse new styling options (default font name/size ...)
- speed improvements to JKQTMathText::useSTIX()
2019-02-09 12:43:12 +01:00
..
jkqtplotter_simpletest_impulsesplot_and_lib.pro added example for geometric objects 2019-01-07 21:00:56 +01:00
jkqtplotter_simpletest_impulsesplot.cpp - more refactorings to modernize C++ 2019-01-26 18:00:42 +01:00
jkqtplotter_simpletest_impulsesplot.pro - added styling system for JKQTPlotter (+example app) 2019-02-09 12:43:12 +01:00
README.md improved documentation 2019-02-03 20:25:25 +01:00

Example (JKQTPlotter): Simple impulse plots

This project (see ./examples/simpletest_impulsesplot/) simply creates a JKQTPlotter widget (as a new window) and adds a single impulse graph. The source code of the main application is (see jkqtplotter_simpletest_impulsesplot.cpp.

First data for a curve is calculated and stored in QVector<double>:

    QVector<double> X, Y;
    for (int i=0; i<Ndata; i++) {
        const double xx=double(i)/double(Ndata)*6.0*M_PI;
        X << xx;
        Y << cos(xx)*exp(-xx/10.0);
    }

... and finally the data is copied into the datastore

    size_t columnX=ds->addCopiedColumn(X,  "x");
    size_t columnY=ds->addCopiedColumn(Y,  "y");

Now an impulse graph object is generated and added to the plot:

    JKQTPImpulsesVerticalGraph* graph=new JKQTPImpulsesVerticalGraph(&plot);
    graph->setXColumn(columnX);
    graph->setYColumn(columnY);
	graph->setLineWidth(2);
	graph->setColor(QColor("red"));
    graph->setTitle(QObject::tr("$\\cos(x)\\cdot\\exp(-x/10)$"));

    plot.addGraph(graph);

The result looks like this:

jkqtplotter_simpletest_impulsesplot

There is an alternative class JKQTPImpulsesHorizontalGraph which draws horizontal impulse plots:

    JKQTPImpulsesHorizontalGraph* graph=new JKQTPImpulsesHorizontalGraph(&plot);
    graph->setYColumn(columnX);
    graph->setXColumn(columnY);
    graph->setLineWidth(2);
    graph->setColor(QColor("blue"));
    graph->setTitle(QObject::tr("$\\cos(x)\\cdot\\exp(-x/10)$"));

This code snippet results in a plot like this:

jkqtplotter_simpletest_impulsesplot