AutoRange axis in CircularDoubleErrorDataSet

[RossHS]

Hello,

I am using a CircularDoubleErrorDataSet to display real-time data with a given 400 points buffer size and I would like to know if it even possible to implement autoRanging of the yAxis? What i mean. If you look at the first screenshot you may see the correct auto range for y axis. (For testing, I created a linear function growing in time with an initial point of (200;200) and auto range work correct).

But over time, when the buffer overflows and we no longer see y-point 200, auto range locked at this minimum value and it doesn't work the way I want

Do you have any practice to solve this kind of problem?

Thanks for the great lib!

[RossHS]

Little update. Version 11.2.3 does not have this problem, everything works as it should. Thus, this is a bug of version 11.2.4. As I understand in version 11.2.4, the values of the min and max in the CircularDoubleErrorDataSet::getAxisDescription are calculated incorrectly.

screenshots of the same code, but with the library of the previous version:

[RalphSteinhagen]

@RossHS thanks for spotting and reporting. This may have slipped in with one of the last PRs.

I will have a look at it and make a new release by the end of the day.

[yezhengli-Mr9]

Dear @RossHS ,
How does your dataset update mechanism code look like? #647 For your use case of CircularDoubleErrorDataSet,
are you using

chart-fx/chartfx-samples/src/main/java/io/fair_acc/sample/chart/PaddedAutoGrowAxisSample.java

Lines 40 to 62 in ed86318

	CachedDaemonThreadFactory.getInstance().newThread(() -> {
	while (true) {
	ds.reset();
	try {
	TimeUnit.MILLISECONDS.sleep(100);
	FXUtils.runAndWait(() -> {
	yAxis.getAutoRange().set(0, 10);
	});
	TimeUnit.MILLISECONDS.sleep(100);
	} catch (Exception e) {
	e.printStackTrace();
	}
	for (int i = 0; i < 500; i++) {
	ds.add(i, 40 * Math.sin(i * 0.1) + 100 * Math.sin(i * 0.02), 0, 0);
	try {
	TimeUnit.MILLISECONDS.sleep(40);
	} catch (InterruptedException e) {
	e.printStackTrace();
	}
	}
	}
	})
	.start();

or codes like (but does not feel that relevant to CircularDoubleErrorDataSet:

chart-fx/chartfx-samples/src/main/java/io/fair_acc/sample/dataset/FifoDoubleErrorDataSetSample.java

Lines 58 to 63 in ed86318

	timer.scheduleAtFixedRate(new TimerTask() {
	@Override
	public void run() {
	System.gc();
	}
	}, 5, 2000);

chart-fx/chartfx-samples/src/main/java/io/fair_acc/sample/financial/AbstractBasicFinancialApplication.java

Lines 207 to 215 in ed86318

	} else {
	ohlcvDataSet = new OhlcvDataSet(resource);
	indiSet = new DefaultDataSet("MA(24)");
	try {
	loadTestData(resource, ohlcvDataSet, indiSet);
	} catch (IOException e) {
	throw new IllegalArgumentException(e.getMessage(), e);
	}
	}

[ennerf]

@yezhengli-Mr9 please stop created off-topic comments on issues that have been closed for years. This is not maintainable.

The framework has changed significantly since then, so the old code might not even be best practice anymore. Please create a separate issue for your actual question.