Age vs. Systolic Blood pressure

This graph shows Age vs. Systolic Blood pressure of patients in the Dominican Republic who were treated for a variety of ailments.

The data for this plot was obtained from the following source: Data Source

The specific file is called DominicanHTN.xls. (I then converted it to a csv file).

The plot was created from guidance from the following video: Video

I also had some help creating my legend from prof Kelleher.

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  		<title>Rob's Scatter Plot</title>
		<style>
      body{font-family: sans-serif;}
      
			//.circles{fill:"red";}
      
      
      .legendCells, text {
        fill: #8E8883;
        font-size: 10pt;
        font-family: sans-serif;
      }
      
      
      .axis-label, .legend-label 
      {
        fill: #635F5D;
        font-size: 20pt;
        font-family: sans-serif;
      }

</style>
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3-legend/2.24.0/d3-legend.min.js"></script>
 
</head>

<body>
  
  <h1>Age vs. Systolic Blood Pessure</h1>
  <script>

var pointRadius = 6;
		var margin = {left: 100, right: 20, top: 20, bottom: 180};
		var outerWidth = 940;
		var innerWidth = outerWidth - margin["left"] - margin["right"];
		var outerHeight = 500;
		var innerHeight = outerHeight - margin["top"] - margin["bottom"];
    
		
		var svg = d3.select("body").append("svg").attr("width", outerWidth).attr("height", outerHeight);
		var g = svg.append("g").attr("transform", "translate(" + margin["left"] + "," + margin["top"] +")");
		
		var xAxisG = g.append("g").attr("transform", "translate(0," + innerHeight + ")");

var yAxisG = g.append("g");
    
   
		
		var colorLegendG = g.append("g").attr("transform", "translate(50, 40)");

function render(data
      , x_input
      , y_input
      , color_input){
		
			var colorValue = d => d[color_input];
			var max_x = d3.max(data, function(d){return d[x_input];});
			var max_y = d3.max(data, function(d){return d[y_input];});		
			var xScale = d3.scaleLinear().range([0,innerWidth]).domain([0,max_x]);
			var yScale = d3.scaleLinear().range([innerHeight,0]).domain([0,max_y]);	
			var colorScale = d3.scaleOrdinal().range(d3.schemeCategory10);
      
			var xAxis = d3.axisBottom().scale(xScale).tickPadding(2);
			var yAxis = d3.axisLeft().scale(yScale).tickPadding(2);

xAxisG
        .append("text")
        	.attr('class', 'axis-label')
        	.attr("x", innerWidth/2)
        	.attr("y", margin["bottom"]/4)
        	.text(x_input + " (Years)"); 
      
			yAxisG
        .append("text")
        	.attr("x", -innerHeight/5)
        	.attr('class', 'axis-label')
        	.attr("y", -margin["left"]/2)
        	.attr("transform", `rotate(-90)`)
        	.text(y_input + "(Systolic)");
	     
      
       colorLegendG
         .append('text')
         		.attr('class', 'legend-label')
         		.attr('x', -10)
         		.attr('y', -15)
         		.text(color_input);
      
      
      const colorLegend = d3.legendColor()
      	.scale(colorScale)
      	.shape('circle');

xScale.domain([0, max_x]);
			yScale.domain([0,max_y]);
      
			xAxisG.call(xAxis);
			yAxisG.call(yAxis);

var circs = g.selectAll("circle").data(data);
			
			circs.enter().append("circle")
				.attr("r",pointRadius)
				.attr("stroke", d => colorScale(colorValue(d)))
      	.attr("fill","none")
				.attr("cx", function(d){return(xScale(d[x_input]));})
				.attr("cy", function(d){return(yScale(d[y_input]));});
			
			circs.exit().remove();

colorLegendG.call(colorLegend) //Has to come after the rendering of the circle since
      .selectAll('.cell text')  //colordomain is automatically filled and legend needs color domain
      .attr('dy', '0.1em');         
      
      
      
				};

const row = d =>{
      d.Age = +d.Age;
      d.SBP = +d.SBP;
	  	d.DBP = +d.DBP
      d.Gender = d.Gender;
      return(d);
      
      
    };
    
    
    
		d3.csv("DominicanHTD.csv",row, function(array){render(array, "Age", "SBP", "Gender");});

</script>
</body>

https://d3js.org/d3.v4.min.js

https://cdnjs.cloudflare.com/ajax/libs/d3-legend/2.24.0/d3-legend.min.js