jalapic/d3_line

## d3_line
<!DOCTYPE html>
<meta charset="utf-8">
<style> /* set the CSS */

body { font: 12px Arial;}

path {
    stroke: steelblue;
    stroke-width: 2;
    fill: none;
    opacity: 0.2;
}

.axis path,
.axis line {
    fill: none;
    stroke: grey;
    stroke-width: 1;
    opacity: 0.5;
    shape-rendering: crispEdges;
}

.legend {
    font-size: 16px;
    font-weight: bold;
    text-anchor: middle;
}

div.tooltip {
    position: absolute;
    text-align: center;
    width: 60px;
    height: 28px;
    padding: 2px;
    font: 12px sans-serif;
    background: lightsteelblue;
    border: 0px;
    border-radius: 8px;
    pointer-events: none;
}


</style>
<body>

<!-- load the d3.js library -->
<script src="http://d3js.org/d3.v3.min.js"></script>

<script>

// Set the dimensions of the canvas / graph
var margin = {top: 30, right: 20, bottom: 70, left: 50},
    width = 700 - margin.left - margin.right,
    height = 400 - margin.top - margin.bottom;

// Parse the date / time
var parseDate = d3.time.format("%b %Y").parse;

// Set the ranges
var x = d3.time.scale().range([0, width]);
var y = d3.scale.linear().range([height, 0]);

// Define the axes
var xAxis = d3.svg.axis().scale(x)
    .orient("bottom").ticks(5);

var yAxis = d3.svg.axis().scale(y)
    .orient("left").ticks(5);

// Define the line
var priceline = d3.svg.line()
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.price); });

// Adds the svg canvas
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 + ")");

var color = d3.scale.category10();

// Define the div for the tooltip
var div = d3.select("body").append("div")
    .attr("class", "tooltip")
    .style("opacity", 0);

// Get the data
d3.csv("stocks.csv", function(error, data) {
    data.forEach(function(d) {
  d.date = parseDate(d.date);
  d.price = +d.price;
    });

    // Scale the range of the data
    x.domain(d3.extent(data, function(d) { return d.date; }));
    y.domain([0, d3.max(data, function(d) { return d.price; })]);

    // Nest the entries by symbol
    var dataNest = d3.nest()
        .key(function(d) {return d.symbol;})
        .entries(data);

// spacing for legend // ******
legendSpace = width/dataNest.length;

   // Loop through each symbol / key
   dataNest.forEach(function(d,i) {

        svg.append("path")
            .attr("class", "line")
            .style("stroke", function() {
                return d.color = color(d.key); })
            .attr("id", 'tag'+d.key.replace(/\s+/g, '')) // assign ID **
            .attr("d", priceline(d.values));


        // Add the Legend
        svg.append("text")
            .attr("x", (legendSpace/2)+i*legendSpace)
            .attr("y", height + (margin.bottom/2)+ 5)
            .attr("class", "legend")
            .style("fill", function() {
                return d.color = color(d.key); })
            .on("click", function(){                     // ************
                // Determine if current line is visible
                var active   = d.active ? false : true,  // ************
                newOpacity = active ? 1 : 0.2;             // ************
                // Hide or show the elements based on the ID
                d3.select("#tag"+d.key.replace(/\s+/g, '')) // *********
                    .transition().duration(100)          // ************
                    .style("opacity", newOpacity);       // ************
                // Update whether or not the elements are active
                d.active = active;                       // ************
                })                                       // ************
            .text(d.key);

    });

// Add some datapoints
        svg.selectAll("dot")
            .data(data)
            .enter().append("circle")
            .attr("r", 1.5)
             .style("fill", "white")
             .style("opacity", .8)
             .style("stroke-width", 1)
            .attr("cx", function(d) { return x(d.date); })
            .attr("cy", function(d) { return y(d.price); })
            .style("stroke", function(d) { return color(d.symbol); })

            .on("mouseover", function(d) {
                d3.select(this).attr("r", 10).style("fill", function(d) { return color(d.symbol); });

            div.transition()
                .duration(200)
                .style("opacity", .9);

             div.html(formatTime(d.date) + "<br/>"  + d.price)
                .style("left", (d3.event.pageX) + "px")
                .style("top", (d3.event.pageY-28) + "px");


            })


            .on("mouseout", function(d) {
                d3.select(this).attr("r", 1.5).style("fill", "white");

            div.transition()
                .duration(500)
                .style("opacity", 0);

                });


    // Add the X Axis
    svg.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(0," + height + ")")
        .call(xAxis);

    // Add the Y Axis
    svg.append("g")
        .attr("class", "y axis")
        .call(yAxis);


});

</script>
</body>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style> /* set the CSS */

	body { font: 12px Arial;}

	path {
	stroke: steelblue;
	stroke-width: 2;
	fill: none;
	opacity: 0.2;
	}

	.axis path,
	.axis line {
	fill: none;
	stroke: grey;
	stroke-width: 1;
	opacity: 0.5;
	shape-rendering: crispEdges;
	}

	.legend {
	font-size: 16px;
	font-weight: bold;
	text-anchor: middle;
	}

	div.tooltip {
	position: absolute;
	text-align: center;
	width: 60px;
	height: 28px;
	padding: 2px;
	font: 12px sans-serif;
	background: lightsteelblue;
	border: 0px;
	border-radius: 8px;
	pointer-events: none;
	}


	</style>
	<body>

	<!-- load the d3.js library -->
	<script src="http://d3js.org/d3.v3.min.js"></script>

	<script>

	// Set the dimensions of the canvas / graph
	var margin = {top: 30, right: 20, bottom: 70, left: 50},
	width = 700 - margin.left - margin.right,
	height = 400 - margin.top - margin.bottom;

	// Parse the date / time
	var parseDate = d3.time.format("%b %Y").parse;

	// Set the ranges
	var x = d3.time.scale().range([0, width]);
	var y = d3.scale.linear().range([height, 0]);

	// Define the axes
	var xAxis = d3.svg.axis().scale(x)
	.orient("bottom").ticks(5);

	var yAxis = d3.svg.axis().scale(y)
	.orient("left").ticks(5);

	// Define the line
	var priceline = d3.svg.line()
	.x(function(d) { return x(d.date); })
	.y(function(d) { return y(d.price); });

	// Adds the svg canvas
	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 + ")");

	var color = d3.scale.category10();

	// Define the div for the tooltip
	var div = d3.select("body").append("div")
	.attr("class", "tooltip")
	.style("opacity", 0);

	// Get the data
	d3.csv("stocks.csv", function(error, data) {
	data.forEach(function(d) {
	d.date = parseDate(d.date);
	d.price = +d.price;
	});

	// Scale the range of the data
	x.domain(d3.extent(data, function(d) { return d.date; }));
	y.domain([0, d3.max(data, function(d) { return d.price; })]);

	// Nest the entries by symbol
	var dataNest = d3.nest()
	.key(function(d) {return d.symbol;})
	.entries(data);

	// spacing for legend // ******
	legendSpace = width/dataNest.length;

	// Loop through each symbol / key
	dataNest.forEach(function(d,i) {

	svg.append("path")
	.attr("class", "line")
	.style("stroke", function() {
	return d.color = color(d.key); })
	.attr("id", 'tag'+d.key.replace(/\s+/g, '')) // assign ID **
	.attr("d", priceline(d.values));


	// Add the Legend
	svg.append("text")
	.attr("x", (legendSpace/2)+i*legendSpace)
	.attr("y", height + (margin.bottom/2)+ 5)
	.attr("class", "legend")
	.style("fill", function() {
	return d.color = color(d.key); })
	.on("click", function(){ // ************
	// Determine if current line is visible
	var active = d.active ? false : true, // ************
	newOpacity = active ? 1 : 0.2; // ************
	// Hide or show the elements based on the ID
	d3.select("#tag"+d.key.replace(/\s+/g, '')) // *********
	.transition().duration(100) // ************
	.style("opacity", newOpacity); // ************
	// Update whether or not the elements are active
	d.active = active; // ************
	}) // ************
	.text(d.key);

	});

	// Add some datapoints
	svg.selectAll("dot")
	.data(data)
	.enter().append("circle")
	.attr("r", 1.5)
	.style("fill", "white")
	.style("opacity", .8)
	.style("stroke-width", 1)
	.attr("cx", function(d) { return x(d.date); })
	.attr("cy", function(d) { return y(d.price); })
	.style("stroke", function(d) { return color(d.symbol); })

	.on("mouseover", function(d) {
	d3.select(this).attr("r", 10).style("fill", function(d) { return color(d.symbol); });

	div.transition()
	.duration(200)
	.style("opacity", .9);

	div.html(formatTime(d.date) + "<br/>" + d.price)
	.style("left", (d3.event.pageX) + "px")
	.style("top", (d3.event.pageY-28) + "px");


	})


	.on("mouseout", function(d) {
	d3.select(this).attr("r", 1.5).style("fill", "white");

	div.transition()
	.duration(500)
	.style("opacity", 0);

	});



	// Add the X Axis
	svg.append("g")
	.attr("class", "x axis")
	.attr("transform", "translate(0," + height + ")")
	.call(xAxis);

	// Add the Y Axis
	svg.append("g")
	.attr("class", "y axis")
	.call(yAxis);



	});

	</script>
	</body>