DataViz Scatterplot

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<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.dot {
  stroke: #000;
}

.grid .tick {
    stroke: lightgrey;
    opacity: 0.7;
}
.grid path {
      stroke-width: 0;
}
  
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/d3-path.v0.1.min.js"></script>
<script src="//d3js.org/d3-shape.v0.6.min.js"></script>
<script>

var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

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

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

var color = d3.scale.category10();
  
var shape = d3.scale.ordinal()
            .range(["cross", "circle", "triangle-up"]);

// Axes du graphique
var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

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

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 + ")");

// Donnees
d3.csv("iris.csv", function(error, data) {
  if (error) throw error;

data.forEach(function(d) {
    d.sepal_length = +d.sepal_length;
    d.sepal_width = +d.sepal_width;
  });

x.domain(d3.extent(data, function(d) { return d.sepal_width; })).nice();
  y.domain(d3.extent(data, function(d) { return d.sepal_length; })).nice();

// Légende des axes
  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis)
    .append("text")
      .attr("class", "label")
      .attr("x", width)
      .attr("y", -6)
      .style("text-anchor", "end")
      .text("Sepal Width (cm)");

svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("class", "label")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Sepal Length (cm)")

// Creation des points
  svg.selectAll(".dot")
      .data(data)
    .enter().append("path")
      .attr("class", "dot")
  		.attr("d", function(d) {
    		return d3.svg.symbol().type(shape(d.species))();
  		})
      .attr("transform", function(d) { 
      	return "translate(" + x(d.sepal_width) + "," + y(d.sepal_length) +")"; 
    	})
      .style("fill", function(d) { return color(d.species); });

// --------------------------------------- 
 //									LEGENDE
 // ---------------------------------------
  
  var legend = svg.selectAll(".legend")
      .data(color.domain())
    .enter().append("g")
      .attr("class", "legend")
      .attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });

legend.append("path")
      .attr("d", function(d) {
    		return d3.svg.symbol().type(shape(d))();
  		})
      .attr("transform", function(d) { 
    		return "translate(" + (width -10) + "," + 10 + ")"; 
    	})
  		.style("fill", function(d) { return color(d); });

legend.append("text")
      .attr("x", width - 24)
      .attr("y", 9)
      .attr("dy", ".35em")
      .style("text-anchor", "end")
      .text(function(d) { return d; });
  
 // --------------------------------------- 
 //								MAILLAGE
 // ---------------------------------------

function make_x_axis() {        
      return d3.svg.axis()
          .scale(x)
           .orient("bottom")
           .ticks(10)
  }

function make_y_axis() {        
      return d3.svg.axis()
          .scale(y)
          .orient("left")
          .ticks(10)
  }
  
  svg.append("g")         
        .attr("class", "grid")
        .attr("transform", "translate(0," + height + ")")
        .call(make_x_axis()
            .tickSize(-height, 0, 0)
            .tickFormat("")
        )

svg.append("g")         
        .attr("class", "grid")
        .call(make_y_axis()
            .tickSize(-width, 0, 0)
            .tickFormat("")
        )
  
 // --------------------------------------- 
 //								REGRESSION
 // ---------------------------------------

});
  
</script>

https://d3js.org/d3.v3.min.js

https://d3js.org/d3-path.v0.1.min.js

https://d3js.org/d3-shape.v0.6.min.js