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rfid-graph.html
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<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
.chart rect {
fill: steelblue;
stroke: white;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.js"></script>
<script>
var margin = {top: 20, right: 20, bottom: 30, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var parseDate = d3.time.format("%Y-%m-%d").parse;
var x = d3.time.scale()
.range([margin.left, width-margin.right]);
var y = d3.scale.linear()
.range([height-margin.bottom , margin.top ]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var line = d3.svg.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.value); });
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.json("rfid-checkin.php?report=daily", function(error, json) {
data = [];
Object.keys(json).forEach(function(d) {
foo = {};
foo.date = parseDate(d);
foo.value = json[d];
data.push(foo);
});
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain(d3.extent(data, function(d) { return d.value; }));
svg.attr('class','chart');
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Tags");
bar_width = 20;
svg.selectAll("rect")
.data(data)
.enter().append("rect")
.attr("x", function(d) { return x(d.date) - bar_width/2; })
.attr("y", function(d) { return y(d.value); })
.attr("width", bar_width)
.attr("height", function(d) { return height - y(d.value); });
});
</script>