Add values to a specified series in a DynamicTimeSeriesCollection

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Assuming you started from here, you’ve specified a dataset with two series, but you’re only appending one value with each tick of the Timer. You need two values for each tick. Here’s how I modified the original to get the picture below:

final DynamicTimeSeriesCollection dataset =
    new DynamicTimeSeriesCollection(2, COUNT, new Second());
...
dataset.addSeries(gaussianData(), 0, "Human");
dataset.addSeries(gaussianData(), 1, "Alien");
...
timer = new Timer(FAST, new ActionListener() {

    // two values appended with each tick
    float[] newData = new float[2];

    @Override
    public void actionPerformed(ActionEvent e) {
        newData[0] = randomValue();
        newData[1] = randomValue();
        dataset.advanceTime();
        dataset.appendData(newData);
    }
});

image

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