d3noob/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    This is a multiple line graph demonstrating how to show / hide elements by clicking on other elements.
This graph is part of the code samples for the update to the book D3 Tips and Tricks to version 6 of d3.js.

  
## data4.csv

          
            date
            close
            open

            
              1-May-12
              58.13
              3.41

            
              30-Apr-12
              53.98
              4.55

            
              27-Apr-12
              67.00
              6.78

            
              26-Apr-12
              89.70
              7.85

            
              25-Apr-12
              99.00
              8.92

            
              24-Apr-12
              130.28
              9.92

            
              23-Apr-12
              166.70
              10.13

            
              20-Apr-12
              234.98
              12.23

            
              19-Apr-12
              345.44
              13.45

            
              18-Apr-12
              443.34
              16.04

            
              17-Apr-12
              543.70
              18.03

            
              16-Apr-12
              580.13
              21.02

            
              13-Apr-12
              605.23
              22.34

            
              12-Apr-12
              622.77
              20.15

            
              11-Apr-12
              626.20
              21.26

            
              10-Apr-12
              628.44
              31.04

            
              9-Apr-12
              636.23
              35.04

            
              5-Apr-12
              633.68
              41.02

            
              4-Apr-12
              624.31
              43.05

            
              3-Apr-12
              629.32
              46.03

            
              2-Apr-12
              618.63
              51.03

            
              30-Mar-12
              599.55
              53.42

            
              29-Mar-12
              609.86
              57.82

            
              28-Mar-12
              617.62
              59.01

            
              27-Mar-12
              614.48
              56.03

            
              26-Mar-12
              606.98
              58.01

## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style> /* set the CSS */

.line {
  fill: none;
  stroke: steelblue;
  stroke-width: 2px;
}

.axisSteelBlue text{
  fill: steelblue;
}

.axisRed text{
  fill: red;
}

.legend {
  font: 16px sans-serif;
  font-weight: bold;
  text-anchor: start;
}

</style>
<body>

<!-- load the d3.js library -->
<script src="https://d3js.org/d3.v6.min.js"></script>
<script>

// set the dimensions and margins of the graph
var margin = {top: 20, right: 40, bottom: 60, left: 50},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

// parse the date / time
var parseTime = d3.timeParse("%d-%b-%y");

// set the ranges
var x = d3.scaleTime().range([0, width]);
var y0 = d3.scaleLinear().range([height, 0]);
var y1 = d3.scaleLinear().range([height, 0]);

// define the 1st line
var valueline = d3.line()
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y0(d.close); });

// define the 2nd line
var valueline2 = d3.line()
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y1(d.open); });

// append the svg obgect to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform",
          "translate(" + margin.left + "," + margin.top + ")");

// get the data
d3.csv("data4.csv").then(function(data) {

  // format the data
  data.forEach(function(d) {
      d.date = parseTime(d.date);
      d.close = +d.close;
      d.open = +d.open;
  });

  // scale the range of the data
  x.domain(d3.extent(data, function(d) { return d.date; }));
  y0.domain([0, d3.max(data, function(d) {return Math.max(d.close);})]);
  y1.domain([0, d3.max(data, function(d) {return Math.max(d.open); })]);

  // add the valueline path.
  svg.append("path")
      .data([data])
      .attr("class", "line")
      .attr("id", "blueLine")
      .attr("d", valueline);

  // add the valueline2 path.
  svg.append("path")
      .data([data])
      .attr("class", "line")
      .attr("id", "redLine")
      .style("stroke", "red")
      .attr("d", valueline2);

  // add the X Axis
  svg.append("g")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x));

  // add the Y0 Axis
  svg.append("g")
      .attr("class", "axisSteelBlue")
      .call(d3.axisLeft(y0));

  // add the Y1 Axis
  svg.append("g")
      .attr("class", "axisRed")
      .attr("transform", "translate( " + width + ", 0 )")
      .call(d3.axisRight(y1));

  // add the blue line legend
  svg.append("text")
     .attr("x", 0)
     .attr("y", height + margin.top + 15)
     .attr("class", "legend")
     .style("fill", "steelblue")
     .on("click", function(){
       // determine if current line is visible
       var active   = blueLine.active ? false : true,
       newOpacity = active ? 0 : 1;
       // hide or show the elements
       d3.select("#blueLine").style("opacity", newOpacity);
       // update whether or not the elements are active
       blueLine.active = active;
     })
     .text("Blue Line");

  // add the red line legend
  svg.append("text")
     .attr("x", 0)
     .attr("y", height + margin.top + 35)
     .attr("class", "legend")
     .style("fill", "red")
     .on("click", function(){
       // determine if current line is visible
       var active   = redLine.active ? false : true,
       newOpacity = active ? 0 : 1;
       // hide or show the elements
       d3.select("#redLine").style("opacity", newOpacity);
       // update whether or not the elements are active
       redLine.active = active;
     })
     .text("Red Line");

});

</script>
</body>
date	close	open
1-May-12	58.13	3.41
30-Apr-12	53.98	4.55
27-Apr-12	67.00	6.78
26-Apr-12	89.70	7.85
25-Apr-12	99.00	8.92
24-Apr-12	130.28	9.92
23-Apr-12	166.70	10.13
20-Apr-12	234.98	12.23
19-Apr-12	345.44	13.45
18-Apr-12	443.34	16.04
17-Apr-12	543.70	18.03
16-Apr-12	580.13	21.02
13-Apr-12	605.23	22.34
12-Apr-12	622.77	20.15
11-Apr-12	626.20	21.26
10-Apr-12	628.44	31.04
9-Apr-12	636.23	35.04
5-Apr-12	633.68	41.02
4-Apr-12	624.31	43.05
3-Apr-12	629.32	46.03
2-Apr-12	618.63	51.03
30-Mar-12	599.55	53.42
29-Mar-12	609.86	57.82
28-Mar-12	617.62	59.01
27-Mar-12	614.48	56.03
26-Mar-12	606.98	58.01
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style> /* set the CSS */

	.line {
	fill: none;
	stroke: steelblue;
	stroke-width: 2px;
	}

	.axisSteelBlue text{
	fill: steelblue;
	}

	.axisRed text{
	fill: red;
	}

	.legend {
	font: 16px sans-serif;
	font-weight: bold;
	text-anchor: start;
	}

	</style>
	<body>

	<!-- load the d3.js library -->
	<script src="https://d3js.org/d3.v6.min.js"></script>
	<script>

	// set the dimensions and margins of the graph
	var margin = {top: 20, right: 40, bottom: 60, left: 50},
	width = 960 - margin.left - margin.right,
	height = 500 - margin.top - margin.bottom;

	// parse the date / time
	var parseTime = d3.timeParse("%d-%b-%y");

	// set the ranges
	var x = d3.scaleTime().range([0, width]);
	var y0 = d3.scaleLinear().range([height, 0]);
	var y1 = d3.scaleLinear().range([height, 0]);

	// define the 1st line
	var valueline = d3.line()
	.x(function(d) { return x(d.date); })
	.y(function(d) { return y0(d.close); });

	// define the 2nd line
	var valueline2 = d3.line()
	.x(function(d) { return x(d.date); })
	.y(function(d) { return y1(d.open); });

	// append the svg obgect to the body of the page
	// appends a 'group' element to 'svg'
	// moves the 'group' element to the top left margin
	var svg = d3.select("body").append("svg")
	.attr("width", width + margin.left + margin.right)
	.attr("height", height + margin.top + margin.bottom)
	.append("g")
	.attr("transform",
	"translate(" + margin.left + "," + margin.top + ")");

	// get the data
	d3.csv("data4.csv").then(function(data) {

	// format the data
	data.forEach(function(d) {
	d.date = parseTime(d.date);
	d.close = +d.close;
	d.open = +d.open;
	});

	// scale the range of the data
	x.domain(d3.extent(data, function(d) { return d.date; }));
	y0.domain([0, d3.max(data, function(d) {return Math.max(d.close);})]);
	y1.domain([0, d3.max(data, function(d) {return Math.max(d.open); })]);

	// add the valueline path.
	svg.append("path")
	.data([data])
	.attr("class", "line")
	.attr("id", "blueLine")
	.attr("d", valueline);

	// add the valueline2 path.
	svg.append("path")
	.data([data])
	.attr("class", "line")
	.attr("id", "redLine")
	.style("stroke", "red")
	.attr("d", valueline2);

	// add the X Axis
	svg.append("g")
	.attr("transform", "translate(0," + height + ")")
	.call(d3.axisBottom(x));

	// add the Y0 Axis
	svg.append("g")
	.attr("class", "axisSteelBlue")
	.call(d3.axisLeft(y0));

	// add the Y1 Axis
	svg.append("g")
	.attr("class", "axisRed")
	.attr("transform", "translate( " + width + ", 0 )")
	.call(d3.axisRight(y1));

	// add the blue line legend
	svg.append("text")
	.attr("x", 0)
	.attr("y", height + margin.top + 15)
	.attr("class", "legend")
	.style("fill", "steelblue")
	.on("click", function(){
	// determine if current line is visible
	var active = blueLine.active ? false : true,
	newOpacity = active ? 0 : 1;
	// hide or show the elements
	d3.select("#blueLine").style("opacity", newOpacity);
	// update whether or not the elements are active
	blueLine.active = active;
	})
	.text("Blue Line");

	// add the red line legend
	svg.append("text")
	.attr("x", 0)
	.attr("y", height + margin.top + 35)
	.attr("class", "legend")
	.style("fill", "red")
	.on("click", function(){
	// determine if current line is visible
	var active = redLine.active ? false : true,
	newOpacity = active ? 0 : 1;
	// hide or show the elements
	d3.select("#redLine").style("opacity", newOpacity);
	// update whether or not the elements are active
	redLine.active = active;
	})
	.text("Red Line");

	});

	</script>
	</body>