KSK KSK - 7 months ago 65
HTML Question

The values on x-axis are descending values on grouped bar chart using d3.js

I have transformed the vertical grouped bar chart from horizontal grouped bar chart. I have taken the code from the site https://bl.ocks.org/mbostock/3887051. The problem is when I have transformed horizontal to vertical axis the values on x-axis are not ascending but they are descending i.e., the values are 10M, 8M, 6M, 4M etc....I am not sure where I have made a mistake.

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

body {
font: 10px sans-serif;
}

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

.bar {
fill: steelblue;
}

.x.axis path {
display: none;
}

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

var margin = {top: 20, right: 20, bottom: 50, left: 140},
width = 800 - margin.left - margin.right,
height = 900 - margin.top - margin.bottom;

var x0 = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);

var x1 = d3.scale.ordinal();

var y = d3.scale.linear()
.range([height, 0],.1);

var color = d3.scale.ordinal()
.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);

var xAxis = d3.svg.axis()
.scale(y)
.orient("top").ticks(5);

var yAxis = d3.svg.axis()
.scale(x0)
.orient("left");

var svg = d3.select("body").append("svg")
.attr("height", width + margin.left + margin.right)
.attr("width", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

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

var ageNames = d3.keys(data[0]).filter(function(key) { return key !== "State"; });

data.forEach(function(d) {
d.ages = ageNames.map(function(name) { return {name: name, value: +d[name]}; });
});

x0.domain(data.map(function(d) { return d.State; }));
x1.domain(ageNames).rangeRoundBands([0, x0.rangeBand()]);
y.domain([0, d3.max(data, function(d) { return d3.max(d.ages, function(d) { return d.value; }); })]);

svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0,0)")
.call(xAxis);

svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "translate(0," + height + ")")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Population");

var state = svg.selectAll(".state")
.data(data)
.enter().append("g")
.attr("class", "state")
.attr("transform", function(d) { return "translate(0," + x0(d.State) + ")"; });

state.selectAll("rect")
.data(function(d) { return d.ages; })
.enter().append("rect")
.attr("height", x1.rangeBand())
.attr("y", function(d) { return x1(d.name); })
//.attr("x", function(d) { return y(d.value); })
.attr("width", function(d) { return height - y(d.value); })
.style("fill", function(d) { return color(d.name); });

var legend = svg.selectAll(".legend")
.data(ageNames.slice().reverse())
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });

legend.append("rect")
.attr("x", width - 10)
.attr("width", 18)
.attr("height", 18)
.style("fill", color);

legend.append("text")
.attr("x", width - 14)
.attr("y", 9)
.attr("dy", ".35em")
.style("text-anchor", "end")
.text(function(d) { return d; });

});

</script>

Answer

You y-scale which is used on your x-axis is defined as:

var y = d3.scale.linear()
    .range([height, 0] , 0.1);

This runs it in reverse and should be:

var y = d3.scale.linear()
    .range([0, height] , 0.1);
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