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barChart.js
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barChart.js
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/* global d3 */
function barChart() {
var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = 400,
height = 400,
innerWidth = width - margin.left - margin.right,
innerHeight = height - margin.top - margin.bottom,
xValue = function(d) { return d[0]; },
yValue = function(d) { return d[1]; },
xScale = d3.scaleBand().padding(0.1),
yScale = d3.scaleLinear(),
var transTime = 400;
onMouseOver = function () { },
onMouseOut = function () { };
function chart(selection) {
selection.each(function (data) {
// Select the svg element, if it exists.
var svg = d3.select(this).selectAll("svg").data([data]);
// Otherwise, create the skeletal chart.
var svgEnter = svg.enter().append("svg");
var gEnter = svgEnter.append("g");
gEnter.append("g").attr("class", "x axis");
gEnter.append("g").attr("class", "y axis");
svg.select('.title').append('a')
.attr('class', 'reset')
.text('reset')
.style('display', 'none');
innerWidth = width - margin.left - margin.right
innerHeight = height - margin.top - margin.bottom
// Update the outer dimensions.
svg.merge(svgEnter).attr("width", width)
.attr("height", height);
// Update the inner dimensions.
var g = svg.merge(svgEnter).select("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
xScale.rangeRound([0, innerWidth])
.domain(data.map(xValue));
yScale.rangeRound([innerHeight, 0])
.domain([0, d3.max(data, yValue)]);
g.select(".x.axis")
.attr("transform", "translate(0," + innerHeight + ")")
.transition()
.duration(transTime).delay(400)
.call(d3.axisBottom(xScale));
g.select(".y.axis")
.transition()
.call(d3.axisLeft(yScale).ticks(10))
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", "0.71em")
.attr("text-anchor", "end")
.text("Frequency");
var bars = g.selectAll(".bar")
.data(function (d) { return d; });
bars.enter().append("rect")
.attr("class", "bar")
.merge(bars)
.attr("x", X)
.attr("y", Y)
.attr("width", xScale.bandwidth())
.attr("height", function(d) { return innerHeight - Y(d); })
.on("mouseover", onMouseOver)
.on("mouseout", onMouseOut);
bars.exit().remove();
});
}
// The x-accessor for the path generator; xScale ∘ xValue.
function X(d) {
return xScale(xValue(d));
}
// The y-accessor for the path generator; yScale ∘ yValue.
function Y(d) {
return yScale(yValue(d));
}
chart.margin = function(_) {
if (!arguments.length) return margin;
margin = _;
return chart;
};
chart.width = function(_) {
if (!arguments.length) return width;
width = _;
return chart;
};
chart.height = function(_) {
if (!arguments.length) return height;
height = _;
return chart;
};
chart.x = function(_) {
if (!arguments.length) return xValue;
xValue = _;
return chart;
};
chart.y = function(_) {
if (!arguments.length) return yValue;
yValue = _;
return chart;
};
chart.onMouseOver = function(_) {
if (!arguments.length) return onMouseOver;
onMouseOver = _;
return chart;
};
chart.onMouseOut = function(_) {
if (!arguments.length) return onMouseOut;
onMouseOut = _;
return chart;
};
return chart;
}