yifancui/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    An example scatter plot with color legend using D3 and d3-legend.
forked from curran's block: Stylized Scatter Plot with Color Legend

  
## data.csv

          
            x
            y
            color

            
              1
              2
              group1

            
              2
              3
              group2

            
              2.5
              4
              group2

            
              0.5
              4.5
              group1

            
              6
              3
              group1

            
              6.5
              4
              group1

            
              7
              2
              group1

            
              8
              3
              group2

            
              8
              3.5
              group2

## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3-legend/2.24.0/d3-legend.min.js"></script>
    <title>Basic Scatter Plot</title>
    <style>
      body {
        margin: 0px;
      }
      .domain {
        display: none;
      }
      .tick line {
        stroke: #C0C0BB;
      }
      .tick text, .legendCells text {
        fill: #8E8883;
        font-size: 18pt;
        font-family: sans-serif;
      }
      .axis-label, .legend-label {
        fill: #635F5D;
        font-size: 20pt;
        font-family: sans-serif;
      }
    </style>
  </head>
  <body>
    <svg width="960" height="500"></svg>
    <script>
      const xValue = d => d.x;
      //const xLabel = 'Sepal Length';
      const yValue = d => d.y;
      //const yLabel = 'Petal Length';
      const colorValue = d => d.color;
      const colorLabel = 'Group';
      const margin = { left: 120, right: 300, top: 20, bottom: 120 };

      const svg = d3.select('svg');
      const width = svg.attr('width');
      const height = svg.attr('height');
      const innerWidth = width - margin.left - margin.right;
      const innerHeight = height - margin.top - margin.bottom;

      const g = svg.append('g')
          .attr('transform', `translate(${margin.left},${margin.top})`);
      const xAxisG = g.append('g')
          .attr('transform', `translate(0, ${innerHeight})`);
      const yAxisG = g.append('g');
      const colorLegendG = g.append('g')
          .attr('transform', `translate(${innerWidth + 60}, 150)`);

      xAxisG.append('text')
          .attr('class', 'axis-label')
          .attr('x', innerWidth / 2)
          .attr('y', 100)
          //.text(xLabel);

      yAxisG.append('text')
          .attr('class', 'axis-label')
          .attr('x', -innerHeight / 2)
          .attr('y', -60)
          .attr('transform', `rotate(-90)`)
          .style('text-anchor', 'middle')
          //.text(yLabel);

      colorLegendG.append('text')
          .attr('class', 'legend-label')
          .attr('x', -30)
          .attr('y', -40)
          .text(colorLabel);

      const xScale = d3.scaleLinear();
      const yScale = d3.scaleLinear();
      const colorScale = d3.scaleOrdinal()
        .range(d3.schemeCategory10);

      const xAxis = d3.axisBottom()
        .scale(xScale)
        .tickPadding(15)
        .tickSize(-innerHeight);

      const yAxis = d3.axisLeft()
        .scale(yScale)
        .ticks(5)
        .tickPadding(15)
        .tickSize(-innerWidth);

      const colorLegend = d3.legendColor()
        .scale(colorScale)
        .shape('circle');

      const row = d => {
        d.petalLength = +d.X;
        //d.petalWidth = +d.petalWidth;
        d.sepalLength = +d.y;
        //d.sepalWidth = +d.sepalWidth;
        return d;
      };

      d3.csv('data.csv', row, data => {
        xScale
          .domain(d3.extent(data, xValue))
          .range([0, innerWidth])
          .nice();

        yScale
          .domain(d3.extent(data, yValue))
          .range([innerHeight, 0])
          .nice();

        g.selectAll('circle').data(data)
          .enter().append('circle')
            .attr('cx', d => xScale(xValue(d)))
            .attr('cy', d => yScale(yValue(d)))
            .attr('fill', d => colorScale(colorValue(d)))
            .attr('fill-opacity', 0.6)
            .attr('r', 8);

        //xAxisG.call(xAxis);
        //yAxisG.call(yAxis);
        colorLegendG.call(colorLegend)
          .selectAll('.cell text')
            .attr('dy', '0.1em');
      });
    </script>
  </body>
</html>

## thumbnail.png

      
    Raw
  

              thumbnail.png
x	y	color
1	2	group1
2	3	group2
2.5	4	group2
0.5	4.5	group1
6	3	group1
6.5	4	group1
7	2	group1
8	3	group2
8	3.5	group2
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<script src="https://d3js.org/d3.v4.min.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/d3-legend/2.24.0/d3-legend.min.js"></script>
	<title>Basic Scatter Plot</title>
	<style>
	body {
	margin: 0px;
	}
	.domain {
	display: none;
	}
	.tick line {
	stroke: #C0C0BB;
	}
	.tick text, .legendCells text {
	fill: #8E8883;
	font-size: 18pt;
	font-family: sans-serif;
	}
	.axis-label, .legend-label {
	fill: #635F5D;
	font-size: 20pt;
	font-family: sans-serif;
	}
	</style>
	</head>
	<body>
	<svg width="960" height="500"></svg>
	<script>
	const xValue = d => d.x;
	//const xLabel = 'Sepal Length';
	const yValue = d => d.y;
	//const yLabel = 'Petal Length';
	const colorValue = d => d.color;
	const colorLabel = 'Group';
	const margin = { left: 120, right: 300, top: 20, bottom: 120 };

	const svg = d3.select('svg');
	const width = svg.attr('width');
	const height = svg.attr('height');
	const innerWidth = width - margin.left - margin.right;
	const innerHeight = height - margin.top - margin.bottom;

	const g = svg.append('g')
	.attr('transform', `translate(${margin.left},${margin.top})`);
	const xAxisG = g.append('g')
	.attr('transform', `translate(0, ${innerHeight})`);
	const yAxisG = g.append('g');
	const colorLegendG = g.append('g')
	.attr('transform', `translate(${innerWidth + 60}, 150)`);

	xAxisG.append('text')
	.attr('class', 'axis-label')
	.attr('x', innerWidth / 2)
	.attr('y', 100)
	//.text(xLabel);

	yAxisG.append('text')
	.attr('class', 'axis-label')
	.attr('x', -innerHeight / 2)
	.attr('y', -60)
	.attr('transform', `rotate(-90)`)
	.style('text-anchor', 'middle')
	//.text(yLabel);

	colorLegendG.append('text')
	.attr('class', 'legend-label')
	.attr('x', -30)
	.attr('y', -40)
	.text(colorLabel);

	const xScale = d3.scaleLinear();
	const yScale = d3.scaleLinear();
	const colorScale = d3.scaleOrdinal()
	.range(d3.schemeCategory10);

	const xAxis = d3.axisBottom()
	.scale(xScale)
	.tickPadding(15)
	.tickSize(-innerHeight);

	const yAxis = d3.axisLeft()
	.scale(yScale)
	.ticks(5)
	.tickPadding(15)
	.tickSize(-innerWidth);

	const colorLegend = d3.legendColor()
	.scale(colorScale)
	.shape('circle');

	const row = d => {
	d.petalLength = +d.X;
	//d.petalWidth = +d.petalWidth;
	d.sepalLength = +d.y;
	//d.sepalWidth = +d.sepalWidth;
	return d;
	};

	d3.csv('data.csv', row, data => {
	xScale
	.domain(d3.extent(data, xValue))
	.range([0, innerWidth])
	.nice();

	yScale
	.domain(d3.extent(data, yValue))
	.range([innerHeight, 0])
	.nice();

	g.selectAll('circle').data(data)
	.enter().append('circle')
	.attr('cx', d => xScale(xValue(d)))
	.attr('cy', d => yScale(yValue(d)))
	.attr('fill', d => colorScale(colorValue(d)))
	.attr('fill-opacity', 0.6)
	.attr('r', 8);

	//xAxisG.call(xAxis);
	//yAxisG.call(yAxis);
	colorLegendG.call(colorLegend)
	.selectAll('.cell text')
	.attr('dy', '0.1em');
	});
	</script>
	</body>
	</html>