4.8 scatter plot | colour

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<style>

/*Defining text stylings*/

#h1 {
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  color:#f5fa91;
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body {
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.y-axis text, .x-axis text {
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.x-axis path {
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.y-axis path {
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}

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circle {
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<body>
  

<p id="h1">SCATTER PLOT | COLOUR</p>
<div id="link">by
<a href="https://slides.com/sandravizmad">SANDRA</a></div>  
  
<script>

//Margin conventions
var m = {top:100, right:50, bottom:50, left:40}
    w = 800 - m.left - m.right,
    h = 800 - m.top - m.bottom;

//Container
var svg = d3.select("body")
    .append("svg")
    .attr("width", w + m.left + m.right)
    .attr("height", h + m.top + m.bottom)
    .append("g")
		.attr("transform", `translate(${m.left}, ${m.top})`);

//Global variables
var xCol = "sepal_length";
var yCol = "petal_length";
var rCol = "sepal_width";
var colorCol = "species";

//Scaling for the color
var c = d3.scaleOrdinal()
    .range(["#f5fa91", "#8ff798", "#85f6fa"]);

function render(data){

//X scale
var x = d3.scaleLinear()
    .domain(d3.extent(data, d => d[xCol]))
    .range([0, w]);

//Y scale
var y = d3.scaleLinear()
    .domain(d3.extent(data, d => d[yCol]))
    .range([h, 0]);

//Size scale domain
var r = d3.scaleLinear()
    .domain(d3.extent(data, d => d[rCol]))
    .range([5, 20]);

//X axis
svg.append("g")
    .attr("class", "x-axis")
    .attr("transform", `translate(0, ${h})`)
    .call(d3.axisBottom()
    				 .scale(x)
    				 .ticks(5)
             .tickSize(-h)
             .tickPadding(20));

//Y axis
svg.append("g")
    .attr("class", "y-axis")
    .attr("transform", `translate(0, 0)`)
    .call(d3.axisLeft()
    				 .scale(y)
             .ticks(3)
             .tickSize(-w)
             .tickPadding(20));

//Data binding
svg.selectAll("circle")
     .data(data)
     .enter()
     .append("circle")
     .attr("cx", d => x(d[xCol]))
     .attr("cy", d => y(d[yCol]))
     .attr("r", d => r(d[rCol]))
     .attr("fill", d => c(d[colorCol]))
     .attr("stroke", d => c(d[colorCol]));
}

//Data type
function type(d) {
  d.sepal_length = +d.sepal_length;
  d.sepal_width = +d.sepal_width;
  d.petal_length = +d.petal_length;
  d.petal_width = +d.petal_width;
  return d;
}

//Data loading
d3.csv(
  "https://gist.githubusercontent.com/sandravizz/4521b93be28e0b83e3a4177b60e5361b/raw/85f536a3c349826d078a6ccbea88864d06515463/iris",
  type,
  render);

</script>
</body>
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