godds · April 6, 2018 07:24 · lemonadeCookie · Apr 8, 2016
diff --git a/.block b/.block
 license: mit
diff --git a/README.md b/README.md
diff --git a/data.csv b/data.csv
diff --git a/index.html b/index.html
 <!DOCTYPE html>
 <meta charset="utf-8" />
 <style>
    .axis {
      font: 10px sans-serif;
    }
    .axis path,
    .axis line {
      fill: none;
      stroke: #000;
      shape-rendering: crispEdges;
    }
    .brush .extent {
      stroke: #fff;
      fill-opacity: .125;
      shape-rendering: crispEdges;
    }
 </style>
 <body>
 <script src="http://d3js.org/d3.v3.min.js"></script>
 <script>

    // sizing information, including margins so there is space for labels, etc
    var margin =  { top: 20, right: 20, bottom: 100, left: 20 },
        width = 960 - margin.left - margin.right,
        height = 500 - margin.top - margin.bottom,
        marginOverview = { top: 430, right: margin.right, bottom: 20,  left: margin.left },
        heightOverview = 500 - marginOverview.top - marginOverview.bottom;

    // set up a date parsing function for future use
    var parseDate = d3.time.format("%d/%m/%Y").parse;

    // some colours to use for the bars
    var colour = d3.scale.ordinal()
                        .range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);

    // mathematical scales for the x and y axes
    var x = d3.time.scale()
                    .range([0, width]);
    var y = d3.scale.linear()
                    .range([height, 0]);
    var xOverview = d3.time.scale()
                    .range([0, width]);
    var yOverview = d3.scale.linear()
                    .range([heightOverview, 0]);

    // rendering for the x and y axes
    var xAxis = d3.svg.axis()
                    .scale(x)
                    .orient("bottom");
    var yAxis = d3.svg.axis()
                    .scale(y)
                    .orient("left");
    var xAxisOverview = d3.svg.axis()
                    .scale(xOverview)
                    .orient("bottom");

    // something for us to render the chart into
    var svg = d3.select("body")
                    .append("svg") // the overall space
                        .attr("width", width + margin.left + margin.right)
                        .attr("height", height + margin.top + margin.bottom);
    var main = svg.append("g")
                    .attr("class", "main")
                    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
    var overview = svg.append("g")
                        .attr("class", "overview")
                        .attr("transform", "translate(" + marginOverview.left + "," + marginOverview.top + ")");

    // brush tool to let us zoom and pan using the overview chart
    var brush = d3.svg.brush()
                        .x(xOverview)
                        .on("brush", brushed);

    // setup complete, let's get some data!
    d3.csv("data.csv", parse, function(data) {

        // data ranges for the x and y axes
        x.domain(d3.extent(data, function(d) { return d.date; }));
        y.domain([0, d3.max(data, function(d) { return d.total; })]);
        xOverview.domain(x.domain());
        yOverview.domain(y.domain());

        // data range for the bar colours
        // (essentially maps attribute names to colour values)
        colour.domain(d3.keys(data[0]));

        // draw the axes now that they are fully set up
        main.append("g")
            .attr("class", "x axis")
            .attr("transform", "translate(0," + height + ")")
            .call(xAxis);
        main.append("g")
            .attr("class", "y axis")
            .call(yAxis);
        overview.append("g")
            .attr("class", "x axis")
            .attr("transform", "translate(0," + heightOverview + ")")
            .call(xAxisOverview);

        // draw the bars
        main.append("g")
                .attr("class", "bars")
            // a group for each stack of bars, positioned in the correct x position
            .selectAll(".bar.stack")
            .data(data)
            .enter().append("g")
                .attr("class", "bar stack")
                .attr("transform", function(d) { return "translate(" + x(d.date) + ",0)"; })
            // a bar for each value in the stack, positioned in the correct y positions
            .selectAll("rect")
            .data(function(d) { return d.counts; })
            .enter().append("rect")
                .attr("class", "bar")
                .attr("width", 6)
                .attr("y", function(d) { return y(d.y1); })
                .attr("height", function(d) { return y(d.y0) - y(d.y1); })
                .style("fill", function(d) { return colour(d.name); });

        overview.append("g")
                    .attr("class", "bars")
            .selectAll(".bar")
            .data(data)
            .enter().append("rect")
                .attr("class", "bar")
                .attr("x", function(d) { return xOverview(d.date) - 3; })
                .attr("width", 6)
                .attr("y", function(d) { return yOverview(d.total); })
                .attr("height", function(d) { return heightOverview - yOverview(d.total); });

        // add the brush target area on the overview chart
        overview.append("g")
                    .attr("class", "x brush")
                    .call(brush)
                    .selectAll("rect")
                        // -6 is magic number to offset positions for styling/interaction to feel right
                        .attr("y", -6)
                        // need to manually set the height because the brush has
                        // no y scale, i.e. we should see the extent being marked
                        // over the full height of the overview chart
                        .attr("height", heightOverview + 7);  // +7 is magic number for styling

    });

    // by habit, cleaning/parsing the data and return a new object to ensure/clarify data object structure
    function parse(d) {
        var value = { date: parseDate(d.date) }; // turn the date string into a date object

        // adding calculated data to each count in preparation for stacking
        var y0 = 0; // keeps track of where the "previous" value "ended"
        value.counts = ["count", "count2", "count3"].map(function(name) {
            return { name: name,
                     y0: y0,
                     // add this count on to the previous "end" to create a range, and update the "previous end" for the next iteration
                     y1: y0 += +d[name]
                   };
        });
        // quick way to get the total from the previous calculations
        value.total = value.counts[value.counts.length - 1].y1;
        return value;
    }

    // zooming/panning behaviour for overview chart
    function brushed() {
        // update the main chart's x axis data range
        x.domain(brush.empty() ? xOverview.domain() : brush.extent());
        // redraw the bars on the main chart
        main.selectAll(".bar.stack")
                .attr("transform", function(d) { return "translate(" + x(d.date) + ",0)"; })
        // redraw the x axis of the main chart
        main.select(".x.axis").call(xAxis);
    }

 </script>
 </body>
	<!DOCTYPE html>
	<meta charset="utf-8" />
	<style>
	.axis {
	font: 10px sans-serif;
	}
	.axis path,
	.axis line {
	fill: none;
	stroke: #000;
	shape-rendering: crispEdges;
	}
	.brush .extent {
	stroke: #fff;
	fill-opacity: .125;
	shape-rendering: crispEdges;
	}
	</style>
	<body>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script>

	// sizing information, including margins so there is space for labels, etc
	var margin = { top: 20, right: 20, bottom: 100, left: 20 },
	width = 960 - margin.left - margin.right,
	height = 500 - margin.top - margin.bottom,
	marginOverview = { top: 430, right: margin.right, bottom: 20, left: margin.left },
	heightOverview = 500 - marginOverview.top - marginOverview.bottom;

	// set up a date parsing function for future use
	var parseDate = d3.time.format("%d/%m/%Y").parse;

	// some colours to use for the bars
	var colour = d3.scale.ordinal()
	.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);

	// mathematical scales for the x and y axes
	var x = d3.time.scale()
	.range([0, width]);
	var y = d3.scale.linear()
	.range([height, 0]);
	var xOverview = d3.time.scale()
	.range([0, width]);
	var yOverview = d3.scale.linear()
	.range([heightOverview, 0]);

	// rendering for the x and y axes
	var xAxis = d3.svg.axis()
	.scale(x)
	.orient("bottom");
	var yAxis = d3.svg.axis()
	.scale(y)
	.orient("left");
	var xAxisOverview = d3.svg.axis()
	.scale(xOverview)
	.orient("bottom");

	// something for us to render the chart into
	var svg = d3.select("body")
	.append("svg") // the overall space
	.attr("width", width + margin.left + margin.right)
	.attr("height", height + margin.top + margin.bottom);
	var main = svg.append("g")
	.attr("class", "main")
	.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
	var overview = svg.append("g")
	.attr("class", "overview")
	.attr("transform", "translate(" + marginOverview.left + "," + marginOverview.top + ")");

	// brush tool to let us zoom and pan using the overview chart
	var brush = d3.svg.brush()
	.x(xOverview)
	.on("brush", brushed);

	// setup complete, let's get some data!
	d3.csv("data.csv", parse, function(data) {

	// data ranges for the x and y axes
	x.domain(d3.extent(data, function(d) { return d.date; }));
	y.domain([0, d3.max(data, function(d) { return d.total; })]);
	xOverview.domain(x.domain());
	yOverview.domain(y.domain());

	// data range for the bar colours
	// (essentially maps attribute names to colour values)
	colour.domain(d3.keys(data[0]));

	// draw the axes now that they are fully set up
	main.append("g")
	.attr("class", "x axis")
	.attr("transform", "translate(0," + height + ")")
	.call(xAxis);
	main.append("g")
	.attr("class", "y axis")
	.call(yAxis);
	overview.append("g")
	.attr("class", "x axis")
	.attr("transform", "translate(0," + heightOverview + ")")
	.call(xAxisOverview);

	// draw the bars
	main.append("g")
	.attr("class", "bars")
	// a group for each stack of bars, positioned in the correct x position
	.selectAll(".bar.stack")
	.data(data)
	.enter().append("g")
	.attr("class", "bar stack")
	.attr("transform", function(d) { return "translate(" + x(d.date) + ",0)"; })
	// a bar for each value in the stack, positioned in the correct y positions
	.selectAll("rect")
	.data(function(d) { return d.counts; })
	.enter().append("rect")
	.attr("class", "bar")
	.attr("width", 6)
	.attr("y", function(d) { return y(d.y1); })
	.attr("height", function(d) { return y(d.y0) - y(d.y1); })
	.style("fill", function(d) { return colour(d.name); });

	overview.append("g")
	.attr("class", "bars")
	.selectAll(".bar")
	.data(data)
	.enter().append("rect")
	.attr("class", "bar")
	.attr("x", function(d) { return xOverview(d.date) - 3; })
	.attr("width", 6)
	.attr("y", function(d) { return yOverview(d.total); })
	.attr("height", function(d) { return heightOverview - yOverview(d.total); });

	// add the brush target area on the overview chart
	overview.append("g")
	.attr("class", "x brush")
	.call(brush)
	.selectAll("rect")
	// -6 is magic number to offset positions for styling/interaction to feel right
	.attr("y", -6)
	// need to manually set the height because the brush has
	// no y scale, i.e. we should see the extent being marked
	// over the full height of the overview chart
	.attr("height", heightOverview + 7); // +7 is magic number for styling

	});

	// by habit, cleaning/parsing the data and return a new object to ensure/clarify data object structure
	function parse(d) {
	var value = { date: parseDate(d.date) }; // turn the date string into a date object

	// adding calculated data to each count in preparation for stacking
	var y0 = 0; // keeps track of where the "previous" value "ended"
	value.counts = ["count", "count2", "count3"].map(function(name) {
	return { name: name,
	y0: y0,
	// add this count on to the previous "end" to create a range, and update the "previous end" for the next iteration
	y1: y0 += +d[name]
	};
	});
	// quick way to get the total from the previous calculations
	value.total = value.counts[value.counts.length - 1].y1;
	return value;
	}

	// zooming/panning behaviour for overview chart
	function brushed() {
	// update the main chart's x axis data range
	x.domain(brush.empty() ? xOverview.domain() : brush.extent());
	// redraw the bars on the main chart
	main.selectAll(".bar.stack")
	.attr("transform", function(d) { return "translate(" + x(d.date) + ",0)"; })
	// redraw the x axis of the main chart
	main.select(".x.axis").call(xAxis);
	}

	</script>
	</body>
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