no flashing

src/components/scatterplot/drawScatterplotCanvas.js

@@ -60,6 +60,8 @@ export const drawScatterplotCanvasUsingRenderQueue = (
   scatterplotXXaccessor,
   scatterplotYYaccessor
 ) => {
+  /* clear canvas */
+  context.clearRect(0, 0, width, height);
 
   const _currentCellSelectionMap = _.keyBy(currentCellSelection, "CellName"); /* move me to the reducer */
 

src/components/scatterplot/scatterplot.js

@@ -74,8 +74,6 @@ class Scatterplot extends React.Component {
       this.state.xScale &&
       this.state.yScale
     ) {
-      /* clear canvas */
-      this.state.ctx.clearRect(0, 0, width, height);
       drawScatterplotCanvas(
         this.state.ctx,
         this.state.xScale,