data=[ [60,200],[200,200],[340,200] ] let g=this.svg.selectAll('.circle').data(data).join(enter=>{ enter.append('circle') .attr('r',50) .attr('cx',d=>d[0]) .attr('cy',d=>d[1]) }) g.attr('r',50) .attr('cx',60) .attr('cy',200) console.log(g); _enter: [Array(3)] _exit: [Array(1)] _groups: [Array(3)] _parents: [svg]