4.1 bar chart | index

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#h1 {
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body {
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/*Defining chart stylings*/

rect {
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}

text {
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<p id="h1">BAR CHART | INDEX </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 = 700 - m.left - m.right,
    h = 700 - 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})`);

//Data loading
d3.csv(
  "https://gist.githubusercontent.com/sandravizz/22191c2a376a41df870994faf6eab6eb/raw/dfcf4a93505254832e37f66e3328ff6e740908b0/OECD%2520Threatened%2520species:%2520plants%2520by%2520country%25202015",
  prepare,
  data => {

//Sort data by value
  data.sort((b, a) => a.Value - b.Value);

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

//X scale
  var x = d3.scaleBand()
      .domain(d3.range(data.length))
      .rangeRound([0, w])
      .paddingInner(0.05);

//Draw the bars
  svg.selectAll('rect')
      .data(data)
      .enter()
      .append('rect')
      .attr("x",(d, i) => x(i))
      .attr("width", x.bandwidth())
      .attr("y",d => y(d.Value))
      .attr("height", d => h - y(d.Value));

//Creating the lables
  svg.selectAll("text")
    	.data(data)
    	.enter()
    	.append("text")
    	.text(d => d.LOCATION)
    	.attr("x", (d, i) => x(i) + 3)
    	.attr("y", h - 8);
});

//Make sure all variables are numbers
function prepare (d) {
  d.Value = +d.Value;
  return d;
}

</script>
</body>
</html>

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