NHL Slope Graph

NHL slope graph

A slope graph showing how total points and shots per game changed from 2013/14 to 2014/15

<!DOCTYPE html>
  <head>
    <meta charset="utf-8">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
    <style>
  
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</style>
  </head>

<h1>Comparing NHL Teams Across Seasons</h1>
		
       
<div id="buttonContainer">
		<button id="sortfreq">Points</button>
    <button id="sortpct">Shots/Game</button>
  </div>
       
       
  <div class="chartContainer" id="slopeChartContainer">
   	</div>
	
    </div> 
    
    <script>
     
      
      
      
      //Width, height, padding
	var w = 700;
	var h = 700;
	var padding = 40;
		
		 //data
  var dataset = [{"team":"Anaheim Ducks","first":116,"second":109,"firstpct":31.3,"secondpct":30,"delta":-7},{"team":"Arizona Coyotes","first":89,"second":56,"firstpct":30.5,"secondpct":29.2,"delta":-33},{"team":"Boston Bruins","first":117,"second":96,"firstpct":31.9,"secondpct":31,"delta":-21},{"team":"Buffalo Sabres","first":52,"second":54,"firstpct":26.3,"secondpct":24.2,"delta":2},{"team":"Calgary Flames","first":77,"second":97,"firstpct":26.8,"secondpct":27.5,"delta":20},{"team":"Carolina Hurricanes","first":83,"second":71,"firstpct":31.2,"secondpct":30.8,"delta":-12},{"team":"Chicago Blackhawks","first":107,"second":102,"firstpct":33.1,"secondpct":33.9,"delta":-5},{"team":"Colorado Avalanche","first":112,"second":90,"firstpct":29.5,"secondpct":27.9,"delta":-22},{"team":"Columbus Blue Jackets","first":93,"second":89,"firstpct":29.6,"secondpct":28.9,"delta":-4},{"team":"Dallas Stars","first":91,"second":92,"firstpct":31.7,"secondpct":31.2,"delta":1},{"team":"Detroit Red Wings","first":93,"second":100,"firstpct":30,"secondpct":29.6,"delta":7},{"team":"Edmonton Oilers","first":67,"second":62,"firstpct":26.9,"secondpct":28.4,"delta":-5},{"team":"Florida Panthers","first":66,"second":91,"firstpct":29.9,"secondpct":30.7,"delta":25},{"team":"Los Angeles Kings","first":100,"second":95,"firstpct":31.6,"secondpct":30.9,"delta":-5},{"team":"Minnesota Wild","first":98,"second":100,"firstpct":26.6,"secondpct":30.8,"delta":2},{"team":"Montréal Canadiens","first":100,"second":110,"firstpct":28.4,"secondpct":28.5,"delta":10},{"team":"Nashville Predators","first":88,"second":104,"firstpct":29,"secondpct":31.9,"delta":16},{"team":"New Jersey Devils","first":88,"second":78,"firstpct":26.8,"secondpct":24.5,"delta":-10},{"team":"New York Islanders","first":79,"second":101,"firstpct":30.9,"secondpct":33.8,"delta":22},{"team":"New York Rangers","first":96,"second":113,"firstpct":33.2,"secondpct":31.5,"delta":17},{"team":"Ottawa Senators","first":88,"second":99,"firstpct":32.8,"secondpct":31,"delta":11},{"team":"Philadelphia Flyers","first":94,"second":84,"firstpct":30.4,"secondpct":29.4,"delta":-10},{"team":"Pittsburgh Penguins","first":109,"second":98,"firstpct":29.9,"secondpct":31.6,"delta":-11},{"team":"San Jose Sharks","first":111,"second":89,"firstpct":34.8,"secondpct":31.6,"delta":-22},{"team":"St. Louis Blues","first":111,"second":109,"firstpct":29.3,"secondpct":30.9,"delta":-2},{"team":"Tampa Bay Lightning","first":101,"second":108,"firstpct":29.8,"secondpct":29.6,"delta":7},{"team":"Toronto Maple Leafs","first":84,"second":68,"firstpct":27.9,"secondpct":29.2,"delta":-16},{"team":"Vancouver Canucks","first":83,"second":101,"firstpct":30.8,"secondpct":29.9,"delta":18},{"team":"Washington Capitals","first":90,"second":101,"firstpct":29.4,"secondpct":29.5,"delta":11},{"team":"Winnipeg Jets","first":84,"second":99,"firstpct":30.7,"secondpct":29.7,"delta":15}]   ;

//Get values for plotting
var mydataset = []; // store their names within a local array

for(var i = 0; i < dataset.length; i++){
      mydataset.push(
        [dataset[i].first, dataset[i].second, dataset[i].delta, dataset[i].team]
       )        
       }

//Find max values & Create scale functions
      var xMax = d3.max(mydataset, function(d) { return d[0]; })
      var yMax = d3.max(mydataset, function(d) { return d[1]; })
      var max = Math.max(yMax, xMax);  // highest value in dataset
      
      var xMin = d3.min(mydataset, function(d) { return d[0]; })
      var yMin = d3.min(mydataset, function(d) { return d[1]; })
      var min = Math.min(yMin, xMin);  // highest value in dataset
   
			var yScale = d3.scale.linear()
								 .domain([min, max])
								 .range([h - padding, padding])
                 .nice() 
                 ;
   
      var rad = 7 // radius of circle 
      var radback = rad * 1.3
  
//Configure y axis 
		var yAxis = d3.svg.axis()
						.scale(yScale)
						.orient("left")
						.ticks(6)
            ; 
      
      
//Create SVG element
			var svg = d3.select("#slopeChartContainer")
						.append("svg")
						.attr("width", w)
						.attr("height", h);

//Create groups
		var groups = svg.selectAll("g")
						.data(mydataset)  // bind data to the group
						.enter()
						.append("g")
						.attr("class", "lines") 
						
   
    .on("mouseover", function(d) {
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        .text(function(d) {
						return d[3];
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.on("mouseout", function() {d3.select(this).classed("highlight", false);});
      
      
       
 // join paths
  groups.append("line")
			   .attr("x1", (w/4))
         .attr("x2", (w/1.4))
         .attr("y1", function(d) {return yScale(d[0])})
         .attr("y2", function(d) {return yScale(d[1])})
         .style("stroke-width", 3)        
         .attr("stroke",  function(d) {
               if (d[2] <= 0) {return "#000c60";}
                else if (d[2] >=20) {return "#569ffe";} 
                else  {return "#001bea";}
                 })
         .style("opacity", 1)
          ;

//Create first background circles
			groups.append("circle")
         .attr("class", "circles1b")
         .attr("r", radback)
         .attr("cx", (w/4))
         .attr("cy", function(d) {return yScale(d[0])})
          ;      
      
  //Create first circles
	groups.append("circle")
			   .attr("class", "circle1")
         .attr("r", rad)
         .attr("cx", (w/4))
         .attr("cy", function(d) {return yScale(d[0])})
         .attr("stroke",  function(d) {
               if (d[2] <= 0) {return "#000c60";}
                else if (d[2] >=20) {return "#569ffe";} 
                else  {return "#001bea";}
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      .style("opacity", 1)      
          ;
  
//Create second background circles
			groups.append("circle")
         .attr("class", "circles2b")
        .attr("r", radback)
         .attr("cx", (w/1.4))
         .attr("cy", function(d) {return yScale(d[1])})
          ;      
      
      
    
  //Create second circles
   groups.append("circle")
			   .attr("class", "circle2")
         .attr("r", rad) 
         .attr("cx", (w/1.4))
         .attr("cy", function(d) {return yScale(d[1])})
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               if (d[2] <= 0) {return "#000c60";}
                else if (d[2] >=20) {return "#569ffe";} 
                else  {return "#001bea";}
                 })
      .style("opacity", 1) 
          ;    
      
  // First text
       svg.append("text")
          .attr("x", (w/4))
          .attr("y", h-(padding/2))
          .style("text-anchor","middle") 
          .text("2013/14");

// Second text
       svg.append("text")
          .attr("x", (w/1.4))
          .attr("y", h-(padding/2))
         .style("text-anchor","middle") 
          .text("2014/15");
  
  
  //Create y axis
		svg.append("g")
			.attr("class", "axis")
			.attr("transform", "translate(" + (padding*1.5) + ",0)")
			.call(yAxis);
  
    
 // Add the text label for the Y axis
    svg.append("text")
        .attr("class", "ytext")
        .attr("transform", "rotate(-90)")
        .attr("y", (padding/100))
        .attr("x",0 - (h / 2))
        .attr("dy", "1em")
        .style("text-anchor", "middle")
        .text("Points");

// Sort By Percentages
      
d3.select("#sortpct")
			.on("click", function() {
   
      //update data
var mydataset = [];       
for(var i = 0; i < dataset.length; i++){
      mydataset.push(
        [dataset[i].firstpct, dataset[i].secondpct, dataset[i].delta, dataset[i].team]
       )        
       }  
        
      var xMax = d3.max(mydataset, function(d) { return d[0]; })
      var yMax = d3.max(mydataset, function(d) { return d[1]; })
      var max = Math.max(yMax, xMax);  // highest value in dataset
   
      var xMin = d3.min(mydataset, function(d) { return d[0]; })
      var yMin = d3.min(mydataset, function(d) { return d[1]; })
      var min = Math.min(yMin, xMin);  // highest value in dataset

var yScale = d3.scale.linear()
								 .domain([min, max])
								 .range([h - padding, padding])
                 .nice() 
                 ;
  
    
  
 //Update Y axis   
var yAxis = d3.svg.axis()
							  .scale(yScale)
							  .orient("left")
							  .ticks(6); 
    
    svg.select("g.axis")
   				.transition()
					.duration(2000)
      .attr("class", "axis")
			.attr("transform", "translate(" + (padding*1.5) + ",0)")
			.call(yAxis);  			
         
    
    svg.append("text")
        .attr("class", "newytext2")
        .transition()
        .duration(2000)
        .attr("transform", "rotate(-90)")
        .attr("y", (padding/100))
        .attr("x",0 - (h / 2))
        .attr("dy", "1em")
        .style("text-anchor", "middle")
        .text("Shots/Game");

// Remove old Y axis     
    svg.selectAll("text.ytext").remove();
    svg.selectAll("text.newytext").remove();
   
   
//Set-up Transition
   
 var groups = svg.selectAll("g")
	    					.data(mydataset)  // bind data to the group
			    			.transition()
                .duration(2000);
   
 // update join paths
  groups.select("line")
			   .attr("y1", function(d) {return yScale(d[0])})
         .attr("y2", function(d) {return yScale(d[1])})
          ;  
  //update first background circles
	groups.select(".circles1b")
         .attr("cy", function(d) {return yScale(d[0])})
          ;      
 
  //update first circles
	groups.select(".circle1")
			   .attr("cy", function(d) {return yScale(d[0])})
          ;

//update second background circles
	groups.select(".circles2b")
         .attr("cy", function(d) {return yScale(d[1])})
          ;      
       
  //update second circles
   groups.select(".circle2")
         .attr("cy", function(d) {return yScale(d[1])})
         ;  
    
   
 });

// Sort By Frequencies
      
d3.select("#sortfreq")
			.on("click", function() {
   
  
//update data
var mydataset = [];       
for(var i = 0; i < dataset.length; i++){
      mydataset.push(
        [dataset[i].first, dataset[i].second, dataset[i].delta, dataset[i].team]
       )        
       }  
        
      var xMax = d3.max(mydataset, function(d) { return d[0]; })
      var yMax = d3.max(mydataset, function(d) { return d[1]; })
      var max = Math.max(yMax, xMax);  // highest value in dataset
  
      var xMin = d3.min(mydataset, function(d) { return d[0]; })
      var yMin = d3.min(mydataset, function(d) { return d[1]; })
      var min = Math.min(yMin, xMin);  // highest value in dataset

var yScale = d3.scale.linear()
								 .domain([min, max])
								 .range([h - padding, padding])
                 .nice() 
                 ;
        
        
  //Update Y axis   
var yAxis = d3.svg.axis()
							  .scale(yScale)
							  .orient("left")
							  .ticks(6); 
    
    svg.select("g.axis")
						.transition()
						.duration(2000)
      .attr("class", "axis")
			.attr("transform", "translate(" + (padding*1.5) + ",0)")
			.call(yAxis);  			
         
  
  
    svg.append("text")
    .attr("class", "newytext")
        .transition()
        .duration(2000)
        .attr("transform", "rotate(-90)")
        .attr("y", (padding/100))
        .attr("x",0 - (h / 2))
        .attr("dy", "1em")
        .style("text-anchor", "middle")
        .text("Points");

svg.selectAll("text.ytext").remove();   
    svg.selectAll("text.newytext2").remove();
   
   
//Set-up Transition
   
 var groups = svg.selectAll("g")
	    					.data(mydataset)  // bind data to the group
			    			.transition()
                .duration(2000);
   
 // update join paths
  groups.select("line")
			   .attr("y1", function(d) {return yScale(d[0])})
         .attr("y2", function(d) {return yScale(d[1])})
          ;  
  //update first background circles
	groups.select(".circles1b")
         .attr("cy", function(d) {return yScale(d[0])})
          ;      
 
  //update first circles
	groups.select(".circle1")
			   .attr("cy", function(d) {return yScale(d[0])})
          ;

</script>
  </body>

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