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bengadisoufiane/.block

Last active September 17, 2019 18:08
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fresh block
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.block
license: mit
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index.html
<!DOCTYPE html>
<meta charset="utf-8">
<!-- Load d3.js & color palette -->
<script src="https://d3js.org/d3.v4.js"></script>
<script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script>
<!-- Add 2 buttons -->
<button onclick="update(data1)">Variable 1</button>
<button onclick="update(data2)">Variable 2</button>
<!-- Create a div where the graph will take place -->
<div>
<svg id="my_dataviz" height=500 width=500></svg>
<script>
// create 2 data_set
var data1 = [
{group: "A", value: 4},
{group: "B", value: 16},
{group: "C", value: 8}
];
var data2 = [
{group: "A", value: 7},
{group: "B", value: 1},
{group: "C", value: 20},
{group: "D", value: 10}
];
// set the dimensions and margins of the graph
var margin = {top: 30, right: 30, bottom: 70, left: 60},
width = 560 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// append the svg object to the body of the page
var svg = d3.select("#my_dataviz")
.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 + ")");
// Initialize the X axis
// A function that create / update the plot for a given variable:
function update(data) {
d3.selectAll("text").style("opacity","0")
var x = d3.scaleBand()
.range([ 0, width ])
.padding(0.2);
var xAxis = svg.append("g")
.attr("transform", "translate(0," + height + ")")
// Initialize the Y axis
var y = d3.scaleLinear()
.range([ height, 0]);
var yAxis = svg.append("g")
.attr("class", "myYaxis")
// Update the X axis
x.domain(data.map(function(d) { return d.group; }))
xAxis.call(d3.axisBottom(x))
// Update the Y axis
y.domain([0, d3.max(data, function(d) { return d.value }) ]);
yAxis.transition().duration(1000).call(d3.axisLeft(y));
// select the svg area
var SVG = d3.select("#my_dataviz")
// Usually you have a color scale in your chart already
var color = d3.scaleOrdinal()
.domain(data)
.range(d3.schemeSet1);
// Create the u variable
var u = svg.selectAll("rect")
.data(data)
u
.enter()
.append("rect") // Add a new rect for each new elements
.merge(u) // get the already existing elements as well
.transition() // and apply changes to all of them
.duration(1000)
.attr("x", function(d) { return x(d.group); })
.attr("y", function(d) { return y(d.value); })
.attr("width", x.bandwidth())
.attr("height", function(d) { return height - y(d.value); })
.attr("fill", "#69b3a2")
.style("fill", function(d){ return color(d.value)})
.attr("text-anchor", "left")
.style("alignment-baseline", "middle")
// Add one dot in the legend for each name.
var size = 20
var a=svg.selectAll("mydots")
a
.data(data)
.enter()
.append("rect")
.attr("x", 350)
.attr("y", function(d,i){ return 50 + i*(size+5)}) // 100 is where the first dot appears. 25 is the distance between dots
.attr("width", size)
.attr("height", size)
.style("fill", function(d){ return color(d.value)})
// Add one dot in the legend for each name.
var b=svg.selectAll("mydots")
b
.data(data)
.enter()
.append("text")
.merge(b)
.transition()
.duration(1000)
.attr("x", 350 + size*2.352)
.attr("y", function(d,i){ return 55 + i*(size+5) + (size/2)})
.text(function(d){ return d.group})
// If less group in the new dataset, I delete the ones not in use anymore
u
.exit()
.remove();
svg.append("text")
.attr("x", (width / 2))
.attr("y", 0 - (margin.top / 2))
.attr("text-anchor", "middle")
.style("font-size", "16px")
.style("text-decoration", "underline")
.text("Value vs Date Graph");
}
// Initialize the plot with the first dataset
update(data1)
</script>
</div>
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