... var data = [ {name: "one", height: 34, weight: 870, colour: "red"}, {name: "two", height: 12, weight: 650, colour: "green"}, {name: "three", height: 25, weight: 330, colour: "blue"}, ]; svg.selectAll("circle") .data(data) .enter() .append("circle") .attr("r", 10) .attr("cx", 100) .attr("cy", 100)