README: include links to demos

tferr · web-flow · commit 9d0855b89c05 · 2022-08-22T16:41:51.000-04:00
As per https://forum.image.sc/t/scijava-plots-how-is-it-intended-to-work/70905/12?u=tferr
diff --git a/README.md b/README.md
@@ -3,3 +3,22 @@
 # SciJava PlotService
 
 UI-independent framework for creating scientific plots.
+
+
+# Usage and Demos
+
+Run the following Groovy snippet from the [Script Editor](https://github.com/scijava/script-editor):
+
+```groovy
+#@ UIService uiService
+#@ PlotService plotService
+
+plot = plotService.newXYPlot()
+plot.setTitle("XY Plot")
+series = plot.addXYSeries()
+series.setLabel("Series 1")
+series.setValues([1,2,3], [7,3,9])
+uiService.show(plot)
+```
+
+Several Java demos (XY, BoxPlot, Category plots, etc.) are available in [scijava-ui-swing](https://github.com/scijava/scijava-ui-swing/tree/909e16b5cbf1b92e1d8ccce96a3521050c93174a/src/test/java/org/scijava/ui/swing/viewer/plot).
