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  Multiple Datasets with different amout of points
Posted by sinan on Mar-20-2018 02:51
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Hi Peter,

I'm trying to reproduce a graph in ChartDirector like in the picture below.
My problem is to show the circles (or any other symbol) at the corresponding positions in the chart.

My data:

    Date [] timeStampsA;
    Double[] dataSeriesA;

    Date[] timeStampsB; ( signal-points - coloring by condition (negative/positive))
    Double[] dataSeriesB;

My Layer for the A-Series:

        LineLayer layer = c.addLineLayer2();
        layer.setLineWidth(1);
        layer.setFastLineMode();
        layer.setXData(viewPortTimeStampsA);
        layer.addDataSet(viewPortDataSeriesA, 0xccaa00, "Tick");

(with viewport-technique as in your splendit simplezoomscroll example)

How should I construct and layout the second layer??

Thank you in advance!

Sinan
demo.png

  Re: Multiple Datasets with different amout of points
Posted by sinan on Mar-20-2018 03:36
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Hi Peter,

please ignore my question - I solved this already in 2011 :-)

// First prepare Data
    size_t count = vSignals.size();

    yData = new double[count];
    xData = new double[count];
    for(size_t i = 0; i < count; i++ )
    {
        std::pair<double, double>& p = vSignals[i];
        xData[i] = p.first;
        yData[i] = p.second;
    }

// And then create the layer

    ScatterLayer *scatter =
        c->addScatterLayer(DoubleArray(xData, (int)nCount),
                                         DoubleArray(yData, (int)nCount),
                                        "", Chart::CircleSymbol, 15, 0x60ff0000);

Seems a littlebit awkward to me, but it does the job.

Thank you!
Sinan