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hashimkey

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http://plnkr.co/edit/KWp8VGQoRWHJaaxxLdGo?p=preview

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta http-equiv="Content-Language" content="en" />
    <title>Energy Production in California</title>
    <script data-require="d3@3.4.6" data-semver="3.4.6" src="//cdnjs.cloudflare.com/ajax/libs/d3/3.4.6/d3.min.js"></script>
    <style>

body { font: 14px avenir next;}

path { 
    stroke: #;
    stroke-width: ;
    fill: none;
}

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

/*.sources {
    font-size:14px;
    fill:#e5e5e5;
}

.sources:hover {
/*  font-size:18px;*/
    font-weight: 800;
    fill:#853b62;
}*/

/*.graph-svg-component {
    background-color:#e1e1e1;

}*/

div {
        padding: 15px;
        width:800px;
        margin-left:auto;
        margin-right:auto;
          border:10px ;
}

.overlay {
  fill: none;
  pointer-events: all;
}

.focus circle {
  fill: steelblue;
  stroke: steelblue;
}

.line {
  fill: none;
  stroke: #aaa;
  stroke-linejoin: round;
  stroke-linecap: round;
  stroke-width: 1.5px;
}

.line-hover {
  stroke: #e769ab ;
  stroke-width:2;
}

.voronoi path {
  fill: none;
  pointer-events: all;
}

</style>
  </head>

var margin = {top: 50, right: 140, bottom: 50, left: 80},
    width = 1000 - margin.left - margin.right,
    height = 600 - margin.top - margin.bottom;

var parseDate = d3.time.format("%Y").parse,
    bisectDate = d3.bisector(function(d) { return d.date; }).left,
    formatValue = d3.format(",.2f");

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

var xAxis = d3.svg.axis().scale(x)
    .orient("bottom").ticks(15);

var yAxis = d3.svg.axis().scale(y)
    .orient("left").ticks(10);

var voronoi = d3.geom.voronoi()
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.value); })
    .clipExtent([[-margin.left, -margin.top], [width + margin.right, height + margin.bottom]]);

// var  valueline1 = d3.svg.line()
//  .x(function(d) { return x(d.date); })
//  .y(function(d) { return y(d.california_energy_production); });

var valueline2 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.total_hydroelectric); });

var valueline3 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.nuclear); });

var valueline4 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.in_state_coal); });

var valueline5 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.oil); });

var valueline6 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.natural_gas ); });

var valueline7 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.geothermal ); });

var valueline8 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.biomass ); });

var valueline9 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.wind ); });

var valueline10 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.solar ); });

var valueline11 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.other ); });

var valueline12 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.direct_coal_imports ); });

var valueline13 = d3.svg.line()
    // .interpolate("basis") 
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.other_imports ); });

var svg = d3.select("body")
    .append("svg")
        .attr("width", width + margin.left + margin.right)
        .attr("height", height + margin.top + margin.bottom)
        .attr("class", "graph-svg-component")
    .append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

tmp = null;
// Get the data
d3.csv("data_3.csv", function(error, data) {
    
    var flatData = [];
    data.forEach(function(d) {
        d.date = parseDate(d.date);
        // d.california_energy_production = +d.california_energy_production;
        d.total_hydroelectric = +d.total_hydroelectric;
        d.nuclear = +d.nuclear;
        d.in_state_coal = +d.in_state_coal;
        d.oil = +d.oil;
        d.natural_gas = +d.natural_gas;
        d.geothermal = +d.geothermal;
        d.biomass = +d.biomass;
        d.wind = +d.wind;
        d.solar = +d.solar;
        d.other = +d.other;
        d.direct_coal_imports = +d.direct_coal_imports;
        d.other_imports = +d.other_imports;
        flatData.push({date: d.date, value: d.total_hydroelectric, key: "total_hydroelectric"});
        flatData.push({date: d.date, value: d.nuclear, key: "nuclear"});
        flatData.push({date: d.date, value: d.in_state_coal, key: "in_state_coal"});
        flatData.push({date: d.date, value: d.oil, key: "oil"});
        flatData.push({date: d.date, value: d.natural_gas, key: "natural_gas"});
        flatData.push({date: d.date, value: d.geothermal, key: "geothermal"});
        flatData.push({date: d.date, value: d.biomass, key: "biomass"});
        flatData.push({date: d.date, value: d.wind, key: "wind"});
        flatData.push({date: d.date, value: d.solar, key: "solar"});
        flatData.push({date: d.date, value: d.other, key: "other"});
        flatData.push({date: d.date, value: d.direct_coal_imports, key: "direct_coal_imports"});
        flatData.push({date: d.date, value: d.other_imports, key: "other_imports"});
    });
    
    // 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 Math.max( d.total_hydroelectric, d.nuclear,d.in_state_coal, d.oil, d.natural_gas); })]) //, d.geothermal, d.biomass, d.wind, d.solar, d.other, d.direct_coal_imports, d.other_imports); })]);

// Add the valueline path.
    // svg.append("path")       
    //  .attr("class", "line")
    //  .attr("d", valueline1(data));

svg.append("path")      
        .attr("class", "line total_hydroelectric") 
        .attr("d", valueline2(data));

svg.append("path")      
        .attr("class", "line nuclear")  
        .attr("d", valueline3(data));

svg.append("path")      
        .attr("class", "line in_state_coal")
        .attr("d", valueline4(data));

svg.append("path")      
        .attr("class", "line oil")  
        .attr("d", valueline5(data));

svg.append("path")      
        .attr("class", "line natural_gas")  
        .attr("d", valueline6(data));

svg.append("path")      
        .attr("class", "line geothermal")      
        .attr("d", valueline7(data));

svg.append("path")      
        .attr("class", "line biomass")      
        .attr("d", valueline8(data));

svg.append("path")      
        .attr("class", "line wind")
        .attr("d", valueline9(data));

svg.append("path")      
        .attr("class", "line solar")      
        .attr("d", valueline10(data));

svg.append("path")      
        .attr("class", "line other")      
        .attr("d", valueline11(data));

svg.append("path")      
        .attr("class", "line direct_coal_imports")  
        .attr("d", valueline12(data));

svg.append("path")      
        .attr("class", "line other_imports")      
        .attr("d", valueline13(data));

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

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

var focus = svg.append("g")
      .attr("class", "focus")
      .attr("transform", "translate(-100,-100)");

focus.append("circle")
      .attr("r", 4.5);

focus.append("text")
      .attr("x", 9)
      .attr("dy", ".35em");

svg.append("text")
        // .attr("class", "sources")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].total_hydroelectric) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("Total Hydroelectric");

svg.append("text")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].nuclear) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("Nuclear");

svg.append("text")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].in_state_coal) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("In State Coal");

svg.append("text")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].oil) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("Oil");

svg.append("text")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].natural_gas) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("Natural Gas");

svg.append("text")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].geothermal) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("Geotheral");

svg.append("text")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].biomass) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("Biomass");

svg.append("text")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].wind) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("Wind");

svg.append("text")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].solar) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("Solar");

svg.append("text")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].other) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("Other");

svg.append("text")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].direct_coal_imports) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("Direct Coal Imports");

svg.append("text")
        .attr("transform", "translate(" + (width+3) + "," + y(data[30].other_imports) + ")")
        .attr("dy", ".35em")
        .attr("text-anchor", "start")
        .style("fill", "#898989")
        .text("Other Imports");

var voronoiGroup = svg.append("g")
      .attr("class", "voronoi");
      
    voronoiGroup.selectAll("path")
      .data(voronoi(flatData))
      .enter().append("path")
      .attr("d", function(d) { return "M" + d.join("L") + "Z"; })
      .datum(function(d) { return d.point; })
      .on("mouseover", mouseover)
      .on("mouseout", mouseout);

function mouseover(d) {
      console.log(d);
      d3.select("."+d.key).classed("line-hover", true);
      focus.attr("transform", "translate(" + x(d.date) + "," + y(d.value) + ")");
      focus.select("text").text(d.date);
    }
  
    function mouseout(d) {
      d3.select("."+d.key).classed("line-hover", false);
      focus.attr("transform", "translate(-100,-100)");
    }

});

</script>
    </div>
  </body>

</html>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.6/d3.min.js