Scale-Axes

forked from mfrazie2's block: Selection & Data

forked from mfrazie2's block: Enter-Append

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg { width: 100%;height:100%}
  </style>
</head>

<body>
  <svg></svg>
  <script>
    const data = [100,120,53,74,95, 42, 87, 35, 150];
    const rectWidth = 40,
          height = 150;
    const svg = d3.select('svg')
    	.attr('transform', 'translate(40,20)');
    
//     const extent = d3.extent(data);
    
    const yScale = d3.scaleLinear()
    	.domain([height,0])
    	.range([0,150]);
    
    const yAxis = d3.axisLeft()
    	.scale(yScale);
    
    svg.append('g')
    	.attr('transform', `translate(40, 0)`)
    	.call(yAxis)
    
//     console.log(extent);

const xScale = d3.scaleLinear()
    	.domain([0, data.length])
    	.range([0,rectWidth * data.length]);
    
    const xAxis = d3.axisBottom()
    	.scale(xScale);
    
    svg.append('g')
    	.attr('transform', 'translate(40, 150)')
    	.call(xAxis);
    
    
    const enter = svg.selectAll('rect')
    	.data(data)
    	.enter().append('rect')
    	.attr('x', (d,i) => i * rectWidth)
    	.attr('y', d => height - d)
    	.attr('width', rectWidth)
    	.attr('height', d => d)
    	.attr('fill', 'blue')
    	.attr('stroke', 'white')
    	.attr('transform', 'translate(40,1)');

//     console.log(enter.nodes());
//     console.log(enter.data());
    
    // d3.scaleLinear()
    //   .domain([min, max]) // input
    //   .range([min, max]); // output
    // map (0,100) to (0,1) :: domain to range
  </script>
</body>

https://d3js.org/d3.v4.min.js