Vertical date axis on TimeSeriesChart

[IanMayo]

Hi all,
I'd like to produce a scatter plot with date data on the vertical axis. TimeSeriesChart appears to only support date on the horizontal axis. Can this be overridden? Or should I just work from an XYChart?

thanks in advance,
Ian

[david.gilbert]

You can just replace the range axis (which is, by default, a NumberAxis) with a new DateAxis:

Code: Select all

XYPlot plot = (XYPlot) chart.getPlot();
plot.setRangeAxis(new DateAxis("Date"));

Note that the y-values from your dataset will now be interpreted as "milliseconds since 1-Jan-1970" as in java.util.Date.

[IanMayo]

thanks for coming back to me David,

Unfortunately I omitted to indicate that I wish to show my 'range' data (distance in this instance) along the horizontal axis. Extending from your example, I would replace the domain axis with a NumberAxis. At this point, would it have just been better to start with an XYPlot?
cheers,
Ian

[david.gilbert]

OK, is the date axis for your y-values? If yes, and you want the y-values along the horizontal axis, then you can call plot.setOrientation(PlotOrientation.HORIZONTAL). This switches the orientation of the plot, so that the x-axis is the vertical axis and the y-axis is the horizontal axis.

Note that in JFreeChart domainAxis == xAxis and rangeAxis == yAxis. And also, a time series chart *is* an XYPlot, but one that has had its xAxis changed from a NumberAxis to a DateAxis (there's nothing to stop you from changing it back to a NumberAxis again).

[IanMayo]

David,
spot-on, thanks. I'll do that.

Cheers,
Ian