function groupBubbles() {
    hideCategoryTitles();

    // @v4 Reset the 'x' force to draw the bubbles to the center.
    simulation.force('x', d3.forceX().strength(forceStrength).x(center.x));

    // @v4 We can reset the alpha value and restart the simulation
    simulation.alpha(1).restart();
  }
/*
   * Sets visualization in "single group mode".
   * The year labels are hidden and the force layout
   * tick function is set to move all nodes to the
   * center of the visualization.
   */
Sets visualization in "single group mode".
The year labels are hidden and the force layout
tick function is set to move all nodes to the
center of the visualization.
Sets visualization in " single group mode " . The year labels are hidden and the force layout tick function is set to move all nodes to the center of the visualization .
function groupBubbles() {
    hideCategoryTitles();
    simulation.force('x', d3.forceX().strength(forceStrength).x(center.x));
    simulation.alpha(1).restart();
  }
function groupBubbles ( ) { hideCategoryTitles ( ) ; simulation . force ( 'x' , d3 . forceX ( ) . strength ( forceStrength ) . x ( center . x ) ) ; simulation . alpha ( 1 ) . restart ( ) ; }
Sets visualization in "single group mode".
Sets visualization in " single group mode " .
// @v4 Reset the 'x' force to draw the bubbles to the center. // @v4 We can reset the alpha value and restart the simulation