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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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body { |
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font: 10px sans-serif; |
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} |
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.axis path, |
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.axis line { |
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fill: none; |
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stroke: #000; |
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shape-rendering: crispEdges; |
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} |
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.bar { |
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fill: steelblue; |
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} |
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.x.axis path { |
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display: none; |
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} |
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</style> |
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<body> |
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<script src="https://d3js.org/d3.v3.min.js"></script> |
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<script> |
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var margin = {top: 20, right: 20, bottom: 30, left: 40}, |
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width = 960 - margin.left - margin.right, |
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height = 500 - margin.top - margin.bottom; |
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var xValue = function(d) { return d.Year; }, // data -> value |
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xScale = d3.scale.ordinal().rangeRoundBands([0, width], .1), // value -> display |
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xMap = function(d) { return xScale(xValue(d)); }, // data -> display |
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xAxis = d3.svg.axis().scale(xScale).orient("bottom"); |
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var yValue = function(d) { return d.DogsEaten; }, // data -> value |
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yScale = d3.scale.linear().range([height, 0]), // value -> display |
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yMap = function(d) { return yScale(yValue(d)); }, // data -> display |
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yAxis = d3.svg.axis().scale(yScale).orient("left"); |
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var svg = d3.select("body").append("svg") |
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.attr("width", width + margin.left + margin.right) |
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.attr("height", height + margin.top + margin.bottom) |
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.append("g") |
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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d3.csv("data.csv", type, function(error, data) { |
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xScale.domain(data.map(xValue)); // data.map(xValue) returns an array of years |
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yScale.domain([0, d3.max(data, yValue)]); |
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// Note: domain for ordinal needs to be the whole range, not just min/max |
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console.log ("data.map(xValue) = ", data.map(xValue)); |
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svg.append("g") |
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.attr("class", "x axis") |
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.attr("transform", "translate(0," + height + ")") |
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.call(xAxis); |
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svg.append("g") |
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.attr("class", "y axis") |
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.call(yAxis) |
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.append("text") |
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.attr("x", margin.left + 20) |
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.attr("y", 6) |
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.attr("dy", ".71em") |
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.style("text-anchor", "end") |
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.text("Dogs Eaten"); |
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svg.selectAll(".bar") |
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.data(data) |
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.enter().append("rect") |
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.attr("class", "bar") |
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.attr("x", xMap) |
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.attr("width", xScale.rangeBand) |
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.attr("y", yMap) |
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.attr("height", function(d) { return height - yMap(d); }) |
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.attr("style", function(d) {if (d.NewRecord == 1) return "fill:green";}) |
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.attr("debug", function (d) {console.log(d); |
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console.log("x data = ", xValue(d)); |
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console.log("x pixel = ", xMap(d)); |
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console.log("y data = ", yValue(d)); |
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console.log("y pixel = ", yMap(d)); |
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console.log("width = ", xScale.rangeBand(d)); |
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}); |
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}); |
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function type(d) { |
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d.DogsEaten = +d.DogsEaten; // change string into number format |
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return d; |
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} |
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</script> |
