charts - JFreeChart How the X Axis couple with Dataset provided

Question

I came cross a problem with CandleStick chart and after digging deeper I am curious how the JFreeChart to auto coupling the A axis with dataset provided.

The case is after provided a common dataset of OHLCDataset which contains common stock trading daily data, after rendering I get a candle stick chart looks good. But I found it does draw the placeholder on x axis for weekend or holiday, in case the dataset doesn't contain any of those data. Apparently the dataset doesn't provide any API contains trade data for missing days(holiday), I suspect it's X Axis(I used DateAxis) to automatically added those date.

My questions are:

1. How the JFreeChart control to draw a placeholder on Range Axis depends on the Axis/data provided
2. How to remove those placeholder from range axis, or let's say how to ask JfreeChart to draw chart according to dataset item exactly?

enter image description here

    OHLCDataset ohlcDataset = createOHLCDataset(series, symbol);
    

    CandlestickRenderer renderer = new CandlestickRenderer();
    renderer.setAutoWidthMethod(CandlestickRenderer.WIDTHMETHOD_AVERAGE);
    timeAxis = new DateAxis("Date", TimeZone.getDefault(), Locale.CANADA);
    timeAxis.setLowerMargin(0.02);  // reduce the default margins on the time axis
    timeAxis.setUpperMargin(0.02);
    NumberAxis valueAxis1 = new NumberAxis("Price");
    valueAxis1.setAutoRangeIncludesZero(false);  // override default
    XYPlot subplot1 =   new XYPlot(ohlcDataset, timeAxis, valueAxis1, renderer);
    subplot1.setBackgroundPaint(Color.white);

.......

Cheers!

question from:https://stackoverflow.com/questions/65916326/jfreechart-how-the-x-axis-couple-with-dataset-provided

Answer 1

Waitting for answers