a67975e680
- 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
2.9 KiB
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:
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:
The classes JKQTPImpulsesVerticalGraph and JKQTPImpulsesHorizontalGraph also provide the ability to draw a symbol at the end of the impulse, e.g. using this code:
graph->setDrawSymbols(true);
graph->setSymbolType(JKQTPGraphSymbols::JKQTPFilledStar);
This code snippet results in a plot like this:
Finally you can move the baseline (i.e. the level, where the impulses start, which is typically x=0 or y=0) in the classes JKQTPImpulsesVerticalGraph and JKQTPImpulsesHorizontalGraph:
graph->setBaseline(0.25);
This code snippet results in a plot like this:
