demo: Strings on the Y-axis via custom tick formatter (issue #884)#979
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Adds TestForIssue884 showing how to display String labels on the Y-axis of any axes-based chart by plotting numeric category indices and mapping them back to Strings with setYAxisTickLabelsFormattingFunction. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Closes #884.
Adds a runnable demo showing how to display String labels on the Y-axis of any axes-based chart, without a dedicated chart type or an axis-swap flag.
Approach
Plot rows as numeric category indices (
0, 1, 2, …) and map each numeric Y tick back to its String viaStyler#setYAxisTickLabelsFormattingFunction(Function<Double,String>). Non-integer grid positions return""so no stray numeric labels appear.Result
A scatter
XYChartwhose Y-axis readsApples / Bananas / Cherries / Dates / Elderberriesinstead of0–4, with the X-axis staying numeric. Verified by rendering to PNG headless.Notes
standalone/issues/TestForIssueNNNconvention with thegetChart()/main()split so it's headless-safe.HorizontalBarChartalready supports String categories on Y natively (itsyDataisList<?>); this demo covers the general case.🤖 Generated with Claude Code