Scatterplot with d3-annotate

This block is built directly on top of Scatterplot by @mbostock, modified to use v4 and d3-annotate.

Controls for `d3.annotate`:

Click a point to add label
Labels are draggable (d3.drag)
Cmd + Click a label to remove it
Shift + Click a label to edit text
(in the console) JSON.stringify(annotation.serialize()) to save annotations

Note: d3.annotate is very much a work in progress

by @ChrisPolis

<!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;
}

.label { fill: #999; }

/*
 * d3-annotate
 */

.d3-an-container .annotation {
  cursor: move;
 }
.d3-an-container .annotation.dragging {
  cursor: grabbing;
  cursor: -moz-grabbing;
  cursor: -webkit-grabbing;
  text-decoration: underline;
 }
.d3-an-text-edit {
  position: fixed;
  top: 40px;
  left: 40px;
}

</style>
<body>
<script src="//d3js.org/d3.v4.js"></script>
<script src="d3-annotate.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.scaleLinear()
    .range([0, width]);

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

var color = d3.scaleOrdinal(d3.schemeCategory10);

var xAxis = d3.axisBottom()
    .scale(x);

var yAxis = d3.axisLeft()
    .scale(y);

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 + ")");

d3.tsv("data.tsv", function(error, data) {
  if (error) throw error;

data.forEach(function(d) {
    d.sepalLength = +d.sepalLength;
    d.sepalWidth = +d.sepalWidth;
  });

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

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)")

svg.selectAll(".dot")
      .data(data)
    .enter().append("circle")
      .attr("class", "dot")
      .attr("r", 3.5)
      .attr("cx", function(d) { return x(d.sepalWidth); })
      .attr("cy", function(d) { return y(d.sepalLength); })
      .style("fill", function(d) { return color(d.species); });

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("rect")
      .attr("x", width - 18)
      .attr("width", 18)
      .attr("height", 18)
      .style("fill", color);

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

//
  // annotations
  var annotation = window.annotation = d3.annotate()
        // .show((d) => d.species !== "versicolor") // .show(true)
  			.show((d, ndx) => ndx % 12 === 0)
        .text((d) => `${d.species[0]}: ${d.sepalWidth.toFixed(1)} x ${d.sepalLength.toFixed(1)}`)
  			.attr('x', (d) => d.box.x + d.box.width)
  			.attr('dy', 4)
  			.attr('dx', 4)
				.attr('text-anchor', 'start')
        .container(svg.append('g'));

svg.selectAll('.dot').call(annotation);
});

</script>

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