sxywu/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    Built with blockbuilder.org
forked from sxywu's block: Metis Class 5

  
## index.html
<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
/*     i always delete that margin thing in the style  */
  </style>
</head>

<body>
  <script>

   // let's define the margins
   var margin = {top: 20, right: 20, bottom: 20, left: 50};
   var width = 600 - margin.right - margin.left;
   var height = 300 - margin.top - margin.bottom;
   // let's do smaller numbers so that we can see
   // what now?
   var svg = d3.select('body')
   	.append('svg')
    .attr('width', width + margin.right + margin.left)
   	.attr('height', height + margin.top + margin.bottom)
   	// <g> is an SVG group element, and everything
    // within it (circle, rect, line, path, etc.) is relative to it
   	.append('g')
   		.attr('transform', 'translate(' + [margin.left, margin.top] + ')');

// load data
var url = 'https://raw.githubusercontent.com/thisismetis/sf16_dataviz2/master/class05/incomes.csv?token=ABYaAQeuKqG3rafZDHXI6azZ__twa65cks5YKn0JwA%3D%3D';
    d3.csv(url, function(data) {
      var filteredData = data.filter(function(d) {
        return d.cutoff === 'cop50';
      });
      filteredData.forEach(function(d) {
        d.val = +d.val;
        d.year = +d.year;
      });

      var incomeByCountry = d3.nest()
      	.key(function(d) {return d.country})
      	.entries(filteredData);

      // scales!!
      // y is linear because income value is
      // continuous (but you can use log scale, power scale, etc.)
      var yScale = d3.scaleLinear()
      	.range([height, 0])
      // what to use for domain is a lot of trial and error
      // for that matter, which scale to use is
      // also just trial and error to see what looks good
      	.domain(
          [d3.min(filteredData, function(d) {return d.val}) - 5000,
          d3.max(filteredData, function(d) {return d.val}) + 5000]
                 );
      // let's just keep it simple, and use scaleLinear for x-scale also
      // (they're all just years)
      var xScale = d3.scaleLinear()
      	.range([0, width])
      	.domain(d3.extent(filteredData, function(d) {return d.year}));

      var yAxis = d3.axisLeft()
      	.scale(yScale)
      	.tickFormat(d3.format('$,'));
      var xAxis = d3.axisBottom()
      	.scale(xScale)
      	.tickFormat(d3.format(''));

      // now we gotta draw the axes
      svg.append('g')
      	.call(yAxis);
      svg.append('g')
      	.attr('transform', 'translate(' + [0, height] + ')')
      	.call(xAxis);

      // and draw the line!
      // we're only drawing one line, do we need to select all?
      var line = d3.line()
      	.x(function(d) {return xScale(d.year)})
      	.y(function(d) {return yScale(d.val)});

      console.log(incomeByCountry)
      svg.selectAll('path')
      	.data(incomeByCountry)
      	.enter().append('path')
      	.attr('d', function(d) {return line(d.values)})
      	.attr('fill', 'none')
      	// (if statement) ? (then do this) : (else do this)
      	.attr('stroke', function(d) {return d.key === 'United States' ? 'steelblue' : 'gray'})
      	.attr('stroke-width', function(d) {return d.key === 'United States' ? 3 : 1});
    })

  </script>
</body>
	<!DOCTYPE html>
	<head>
	<meta charset="utf-8">
	<script src="https://d3js.org/d3.v4.min.js"></script>
	<style>
	/* i always delete that margin thing in the style */
	</style>
	</head>

	<body>
	<script>

	// let's define the margins
	var margin = {top: 20, right: 20, bottom: 20, left: 50};
	var width = 600 - margin.right - margin.left;
	var height = 300 - margin.top - margin.bottom;
	// let's do smaller numbers so that we can see
	// what now?
	var svg = d3.select('body')
	.append('svg')
	.attr('width', width + margin.right + margin.left)
	.attr('height', height + margin.top + margin.bottom)
	// <g> is an SVG group element, and everything
	// within it (circle, rect, line, path, etc.) is relative to it
	.append('g')
	.attr('transform', 'translate(' + [margin.left, margin.top] + ')');

	// load data
	var url = 'https://raw.githubusercontent.com/thisismetis/sf16_dataviz2/master/class05/incomes.csv?token=ABYaAQeuKqG3rafZDHXI6azZ__twa65cks5YKn0JwA%3D%3D';
	d3.csv(url, function(data) {
	var filteredData = data.filter(function(d) {
	return d.cutoff === 'cop50';
	});
	filteredData.forEach(function(d) {
	d.val = +d.val;
	d.year = +d.year;
	});

	var incomeByCountry = d3.nest()
	.key(function(d) {return d.country})
	.entries(filteredData);

	// scales!!
	// y is linear because income value is
	// continuous (but you can use log scale, power scale, etc.)
	var yScale = d3.scaleLinear()
	.range([height, 0])
	// what to use for domain is a lot of trial and error
	// for that matter, which scale to use is
	// also just trial and error to see what looks good
	.domain(
	[d3.min(filteredData, function(d) {return d.val}) - 5000,
	d3.max(filteredData, function(d) {return d.val}) + 5000]
	);
	// let's just keep it simple, and use scaleLinear for x-scale also
	// (they're all just years)
	var xScale = d3.scaleLinear()
	.range([0, width])
	.domain(d3.extent(filteredData, function(d) {return d.year}));

	var yAxis = d3.axisLeft()
	.scale(yScale)
	.tickFormat(d3.format('$,'));
	var xAxis = d3.axisBottom()
	.scale(xScale)
	.tickFormat(d3.format(''));

	// now we gotta draw the axes
	svg.append('g')
	.call(yAxis);
	svg.append('g')
	.attr('transform', 'translate(' + [0, height] + ')')
	.call(xAxis);

	// and draw the line!
	// we're only drawing one line, do we need to select all?
	var line = d3.line()
	.x(function(d) {return xScale(d.year)})
	.y(function(d) {return yScale(d.val)});

	console.log(incomeByCountry)
	svg.selectAll('path')
	.data(incomeByCountry)
	.enter().append('path')
	.attr('d', function(d) {return line(d.values)})
	.attr('fill', 'none')
	// (if statement) ? (then do this) : (else do this)
	.attr('stroke', function(d) {return d.key === 'United States' ? 'steelblue' : 'gray'})
	.attr('stroke-width', function(d) {return d.key === 'United States' ? 3 : 1});
	})

	</script>
	</body>