JKQtPlotter/examples/simpletest_errorbarstyles/jkqtplotter_simpletest_errorbarstyles.cpp
jkriege2 a67975e680 - major rework of graph styling (now using mix-in classes)
- some reorganizations into different files
- additional options for graph filling (color gradients, textures, ...) as provided by QBrush
- PREPARATIONS: added a general feature to JKQTPPlotElement which allows to show a graph in a highlighted state (if supported by the derived graph class!)
- JKQTPXYParametrizedScatterGraph: added functors to transform column values into symbol type+size and line-width to give even more control
- JKQTPStepHorizontalGraph has been renamed to JKQTPSpecialLineHorizontalGraph (vertical variants also) and have gained additional features (baseline for filling and drawing of symbols)
- filled curve graphs (e.g. JKQTPSpecialLineHorizontalGraph) are now merely a specializedly initialized JKQTPSpecialLineHorizontalGraph
2019-04-22 13:27:50 +02:00

117 lines
4.7 KiB
C++

/** \example jkqtplotter_simpletest_errorbarstyles.cpp
* Shows how to use different error indicator styles with JKQTPlotter
*
* \ref JKQTPlotterErrorBarStyles
*/
#include <QApplication>
#include "jkqtplotter/jkqtplotter.h"
#include "jkqtplotter/jkqtpgraphsscatter.h"
#include "jkqtplottertools/jkqtptools.h"
int main(int argc, char* argv[])
{
QApplication app(argc, argv);
// 1. create a plotter window and get a pointer to the internal datastore (for convenience)
JKQTPlotter plot;
JKQTPDatastore* ds=plot.getDatastore();
// 2. now we create data a vector of x-values for a simple plot
// and generate some values for varying errors
// y-data for the pot will be generated later to position the
// plot at different locations.
QVector<double> X, Yerror, Xerror;
const int Ndata=7; // number of plot points in each curve
for (int i=0; i<Ndata; i++) {
const double x=10.0+double(i)*2.0;
X<<x;
Yerror<<0.35+0.3*sin(x);
Xerror<<0.35+0.3*sin(x);
}
// and copy it to the datastore
size_t columnX=ds->addCopiedColumn(X, "x");
size_t columnXError=ds->addCopiedColumn(Xerror, "xerror");
size_t columnYError=ds->addCopiedColumn(Yerror, "yerror");
// 3. now we make several plots with different error styles
// for that we iterate over every style from the vector errorStyles
// the array showXandYError indicates whether we want x- and y-error
// for a style for all stywhere this is false, only y-error-indicators
// are shown
QVector<JKQTPErrorPlotstyle> errorStyles {JKQTPNoError, JKQTPErrorBars, JKQTPErrorSimpleBars, JKQTPErrorLines, JKQTPErrorPolygons, JKQTPErrorBoxes, JKQTPErrorEllipses, JKQTPErrorBarsPolygons, JKQTPErrorBarsLines, JKQTPErrorSimpleBarsLines, JKQTPErrorSimpleBarsPolygons };
QVector<bool> showXandYError { false , true , true , false , false , true , true , false , false , false , false };
for (int errorID=0; errorID<errorStyles.size(); errorID++) {
// generate some plot data
QVector<double> Y;
for (auto& xx: X) {
Y<<xx*0.5+static_cast<double>(errorID)*2.5;
}
JKQTPXYLineErrorGraph* graph=new JKQTPXYLineErrorGraph(&plot);
// copy data into datastore and immediately set the yColumn
graph->setXColumn(columnX);
graph->setYColumn(ds->addCopiedColumn(Y, "y"+QString::number(errorID)));
graph->setXErrorColumn(columnXError);
graph->setYErrorColumn(columnYError);
// set error style, for the y-axis
graph->setYErrorStyle(errorStyles[errorID]);
// no error indicators for the x-values
graph->setXErrorStyle(JKQTPNoError);
// ... unless: for some error styles we want error in both directions
if (showXandYError[errorID]) {
graph->setXErrorStyle(errorStyles[errorID]);
graph->setDrawLine(false);
}
// make error indicator 30% transparent
QColor c=graph->getErrorFillColor();
c.setAlphaF(0.3);
graph->setErrorFillColor(c);
// set error indicator line width
graph->setErrorWidth(1);
// set length of small bars at the end of error bars
graph->setErrorbarSize(15);
// set symbol (cross/X) + pen style (and color)dashed)
graph->setSymbolType(JKQTPCross);
graph->setLineStyle(Qt::DashLine);
// set symbol size
graph->setSymbolSize(5);
// set width of symbol lines
graph->setSymbolLineWidth(1);
// set width of graph line
graph->setLineWidth(1);
// graph title is made from symbol+errorStylestyle, we use the LaTeX instruction \verb around the
// result of JKQTPErrorPlotstyle2String(), because it contains underscores that would otherwise
// lead to lower-case letter, which we don't want
graph->setTitle("\\verb{"+JKQTPErrorPlotstyle2String(errorStyles[errorID])+"}");
// add the graph to the plot, so it is actually displayed
plot.addGraph(graph);
}
// 4. autoscale the plot so the graph is contained
plot.zoomToFit();
// 6. change locaion of key (outside top-right)
plot.getPlotter()->setKeyPosition(JKQTPKeyOutsideRightTop);
// ... and switch off the grid
plot.getXAxis()->setDrawGrid(false);
plot.getXAxis()->setDrawMinorGrid(false);
plot.getYAxis()->setDrawGrid(false);
plot.getYAxis()->setDrawMinorGrid(false);
// 7. show plotter and make it a decent size
plot.show();
plot.resize(800,600);
return app.exec();
}