D3.js量表程序

<!DOCTYPE html>
<html>
   <head>
      <script type = text/javascript src = https://d3js.org/d3.v4.min.js></script>
   </head>

   <body>
      <script>
         var data = [100, 200, 300, 350, 400, 250]
         var width = 500, barHeight = 20, margin = 1;

         var scale = d3.scaleLinear()
            .domain([d3.min(data), d3.max(data)])
            .range([100, 400]);

         var svg = d3.select(body)
            .append(svg)
            .attr(width, width)
            .attr(height, barHeight * data.length);

         var g = svg.selectAll(g)
            .data(data)
            .enter()
            .append(g)
            .attr(transform, function (d, i) {
               return translate(0, + i * barHeight + );
         });

         g.append(rect)
         .attr(width, function (d) {
            return scale(d);
         })

         .attr(height, barHeight - margin)
         g.append(text)
         .attr(x, function (d) { return (scale(d)); })
         .attr(y, barHeight / 2).attr(dy, .35em)
         .text(function (d) { return d; });
      </script>
   </body>
</html>

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