                 force = d3.forceSimulation(scaledPoints)
                       .force("y", d3.forceY((d) -> d.y))
                       .force("collide", d3.forceCollide(pointsize*1.1))
-                      .stop()
+                      .on("tick", ticked)
             else
                 d3.range(scaledPoints.length).map( (i) ->
                     scaledPoints[i].fy = scaledPoints[i].y)

                    xscale(x[i]) + u[i]/jitter_width*xNA_size.width/2)

        else if jitter == "beeswarm"
            if horizontal
                d3.range(scaledPoints.length).map( (i) ->
                    scaledPoints[i].fx = scaledPoints[i].x )

                force = d3.forceSimulation(scaledPoints)
                      .force("x", d3.forceX((d) -> d.x))
                      .force("collide", d3.forceCollide(pointsize*1.1))
                      .on("tick", ticked)

        else if jitter != "none"
            d3panels.displayError('dotchart: jitter should be "beeswarm", "random", or "none"')
