BUG ? Y axis values not shown

[slom]

Is this a bug or ?

XYLineChart doesn't show Y axis values in some specific situations.

example;

x=0, y=3.382265073
x=1, y=3.382265073
x=2, y=3.382265073
x=3, y=3.382265073
x=4, y=3.382265073
...
x=19, y=3.382265073

For other values of y it works well.
Labels are shown correctly.

[uls]

i don't know if it's a bug, but it's definitely not a feature.
this happens always if you want to chart the same value. as soon as you add a different value everything shows up.

have no solution for this either.

[JFreeChart Support]

It is a bug in the NumberAxis class - the standard tick unit collection does not have a tick size small enough for the range that is auto-calculated for the axis given a data range of zero. That will get fixed in a future release. In the meantime, one way to avoid the problem is to specify a minimum auto-range for the axis:

Code: Select all

XYPlot plot = (XYPlot) chart.getPlot();
NumberAxis axis = (NumberAxis) plot.getRangeAxis();
axis.setAutoRangeMinimumSize(1.0);

[nerudra]

Can I follow-up on this thread? This still seems to occur in jfreechart 1.0.9....whenever marker value is at a precision of 1.0e-8 or greater, the y-axis will disappear.

[matinh]

Hi!

Not the axis will disappear but the tick marks, right?

You have to provide either a range for the axis, or a suitable TickUnit. This has been discussed earlier. Please search the forum and/or the bug tracker.

hth,
- martin