mirror of
https://github.com/jkriege2/JKQtPlotter.git
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142 lines
4.7 KiB
C++
142 lines
4.7 KiB
C++
/** \example scatter.cpp
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* A very basic example for the usage of JKQTPScatterGraphh
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*
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* \ref JKQTPlotterscatter
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*/
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#include "jkqtpexampleapplication.h"
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#include <QApplication>
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#include "jkqtplotter/jkqtplotter.h"
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#include "jkqtplotter/graphs/jkqtpscatter.h"
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#include "jkqtpexampleapplication.h"
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#include <random>
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void createScatterGraph(JKQTPlotter&plot) {
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JKQTPDatastore* ds=plot.getDatastore();
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// 2. add two columns to the JKQTPDatastore and obtain back-inserter iterators for these
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size_t columnX=ds->addColumn("x");
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auto colXInserter=ds->backInserter(columnX);
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size_t columnY=ds->addColumn("y");
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auto colYInserter=ds->backInserter(columnY);
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// 3. now we create data for a simple plot (a sine curve with random noise)
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std::default_random_engine generator(123);
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std::normal_distribution<double> distribution(0,0.5);
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const int Ndata=100;
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for (int i=0; i<Ndata; i++) {
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// put data
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const double x=double(i)/double(Ndata)*8.0*JKQTPSTATISTICS_PI;
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*colXInserter=x;
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*colYInserter=sin(x)+distribution(generator);
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// advance back-inserters
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colXInserter++;
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colYInserter++;
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}
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// 4. create a graph in the plot, which plots the dataset X/Y:
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JKQTPXYScatterGraph* graph1=new JKQTPXYScatterGraph(&plot);
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graph1->setXColumn(columnX);
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graph1->setYColumn(columnY);
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graph1->setTitle(QObject::tr("sine graph"));
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// 5. add the graph to the plot, so it is actually displayed
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plot.addGraph(graph1);
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// 6. autoscale the plot so the graph is contained
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plot.zoomToFit();
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// show plotter and make it a decent size
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plot.getPlotter()->setPlotLabel(QObject::tr("Scatter Example"));
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plot.show();
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plot.resize(600/plot.devicePixelRatioF(),400/plot.devicePixelRatioF());
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}
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void createErrorScatterGraph(JKQTPlotter&plot) {
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JKQTPDatastore* ds=plot.getDatastore();
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// 2. add two columns to the JKQTPDatastore and obtain back-inserter iterators for these
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size_t columnX=ds->addColumn("x");
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auto colXInserter=ds->backInserter(columnX);
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size_t columnY=ds->addColumn("y");
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auto colYInserter=ds->backInserter(columnY);
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size_t columnY2=ds->addColumn("y2");
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auto colY2Inserter=ds->backInserter(columnY2);
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size_t columnEX=ds->addColumn("xerr");
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auto colEXInserter=ds->backInserter(columnEX);
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size_t columnEY=ds->addColumn("yerr");
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auto colEYInserter=ds->backInserter(columnEY);
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// 3. now we create data for a simple plot (a sine curve with random noise)
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std::default_random_engine generator(123);
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std::normal_distribution<double> distribution(0,0.5);
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const int Ndata=15;
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for (int i=0; i<Ndata; i++) {
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// put data
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const double x=double(i)/double(Ndata)*8.0*JKQTPSTATISTICS_PI;
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*colXInserter=x;
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*colYInserter=sin(x)+2.0;
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*colY2Inserter=cos(x)-2.0;
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*colEXInserter=distribution(generator);
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*colEYInserter=distribution(generator);
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// advance back-inserters
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colXInserter++;
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colYInserter++;
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colY2Inserter++;
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colEXInserter++;
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colEYInserter++;
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}
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// 4. create a graph in the plot, which plots the dataset X/Y:
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JKQTPXYScatterErrorGraph* graph1=new JKQTPXYScatterErrorGraph(&plot);
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graph1->setXColumn(columnX);
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graph1->setYColumn(columnY);
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graph1->setYErrorColumn(columnEY);
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graph1->setYErrorStyle(JKQTPErrorSimpleBars);
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graph1->setSymbolType(JKQTPCross);
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graph1->setTitle(QObject::tr("y-errorlines"));
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plot.addGraph(graph1);
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JKQTPXYScatterErrorGraph* graph2=new JKQTPXYScatterErrorGraph(&plot);
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graph2->setXColumn(columnX);
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graph2->setYColumn(columnY2);
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graph2->setXErrorColumn(columnEX);
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graph2->setYErrorColumn(columnEY);
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graph2->setXErrorStyle(JKQTPErrorBars);
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graph2->setYErrorStyle(JKQTPErrorBars);
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graph2->setTitle(QObject::tr("xy-errorbars"));
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graph2->setSymbolLineWidth(3);
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plot.addGraph(graph2);
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// 6. autoscale the plot so the graph is contained
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plot.zoomToFit();
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// show plotter and make it a decent size
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plot.getPlotter()->setPlotLabel(QObject::tr("Error Scatter Example"));
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plot.setGrid(false);
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plot.show();
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plot.resize(600/plot.devicePixelRatioF(),400/plot.devicePixelRatioF());
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}
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int main(int argc, char* argv[])
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{
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JKQTPAppSettingController highDPIController(argc,argv);
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JKQTPExampleApplication app(argc, argv);
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// 1. create a plotter window and get a pointer to the internal datastore (for convenience)
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JKQTPlotter plot, plotErr;
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createScatterGraph(plot);
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plot.setWindowTitle("1: JKQTPXYScatterGraph");
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createErrorScatterGraph(plotErr);
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plotErr.setWindowTitle("2: JKQTPXYScatterErrorGraph");
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return app.exec();
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}
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