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test2.html
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<!DOCTYPE html>
<meta charset="utf-8">
<head>
<title>SlashDB JSON Based Vertical Bar</title>
<style>
.bar{
fill: steelblue;
}
.bar:hover{
fill: brown;
}
.axis {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
</style>
</head>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script>
// set the dimensions of the canvas
var margin = {top: 20, right: 20, bottom: 70, left: 40},
width = 600 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
// set the ranges
var x = d3.scale.ordinal().rangeRoundBands([0, width], .05);
var y = d3.scale.linear().range([height, 0]);
// define the axis
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.ticks(10);
// add the SVG element
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 + ")");
// load the data from SlashDB via a RESTful API to the resource for the SQL Pass-thru (query)
d3.json("https://demo.slashdb.com/query/sales-by-year.json", function(error, data) {
data.forEach(function(d) {
d.Year = d.Year;
d.Total = +d.Total;
});
// scale the range of the data
x.domain(data.map(function(d) { return d.Year; }));
y.domain([0, d3.max(data, function(d) { return d.Total; })]);
// add axis
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", "-.55em")
.attr("transform", "rotate(-90)" );
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("y", -16)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Sales");
// Add bar chart
svg.selectAll("bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) { return x(d.Year); })
.attr("width", x.rangeBand() - 20)
.attr("y", function(d) { return y(d.Total); })
.attr("height", function(d) { return height - y(d.Total); });
});
</script>
</body>