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%= javascript begin
function show_bargraph(datasource, title, xlab, ylab) {
var margin = {top: 40, right: 20, bottom: 30, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var formatPercent = d3.format(".0%");
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
// .tickFormat(formatPercent);
var tip = d3.tip()
.attr('class', 'd3-tip')
.offset([-10, 0])
.html(function(d) {
return "<strong>Frequency:</strong> <span style='color:red'>" + d.y + "</span>";
})
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 + ")");
svg.call(tip);
d3.tsv(datasource, type, function(error, data) {
if (error) console.warn(error);
x.domain(data.map(function(d) { return d.x; }));
y.domain([0, d3.max(data, function(d) { return d.y; })]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.append("text")
.attr("x", width / 2)
.attr("y", 30)
.style("text-anchor", "middle")
.text(xlab);
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(ylab);
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(title);
svg.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) { return x(d.x); })
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.y); })
.attr("height", function(d) { return height - y(d.y); })
.on('mouseover', tip.show)
.on('mouseout', tip.hide)
});
function type(d) {
d.y = +d.y;
return d;
}
}
show_bargraph('/by_time.tsv?time=hour&metric=delay', 'Durchschnittliche Verspätung nach Uhrzeit',
'Angebrochene Stunde', 'Minuten');
show_bargraph('/by_time.tsv?time=weekday&metric=delay', 'Durchschnittliche Verspätung nach Wochentag',
'Wochentag', 'Minuten');
% end
<div>
Insgesamt: <%= stash('num_departures') %> Züge.
</div>
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