This is a demo tutorial. While there is no step-by-step commentary available (yet), the live demo below is fully functional. Feel free to open it for full source code.
This demo shows how we can toggle ForceDirectedNode on and off using API functions hide() and show() on node's data item.
See the Pen amCharts 4: Toggling ForceDirectedNode via API by amCharts team (@amcharts) on CodePen.24419