Chaf1A/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    Built with blockbuilder.org
forked from romsson's block: simple line chart from dataset

  
## dataset.json
[{"name": "A", "value": 10, "date": "2016-01"},
 {"name": "B", "value": 30, "date": "2016-02"},
 {"name": "C", "value": 20, "date": "2016-03"},
 {"name": "D", "value": 40, "date": "2016-04"},
 {"name": "E", "value": 50, "date": "2016-05"},
 {"name": "F", "value": 20, "date": "2016-06"},
 {"name": "G", "value": 10, "date": "2016-07"}
]

## index.html
<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    .line {
      fill: none;
      stroke: black;
      stroke-width: 1.5px;
    }
  </style>
</head>

<body>
  <script>

    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500);

    var width = 800;
    var height = 400;

    // See formats http://bl.ocks.org/zanarmstrong/raw/05c1e95bf7aa16c4768e/
    // Data sample {"name": "G", "value": 10, "date": "2016-07"}
    var parseDate = d3.timeParse("%Y-%m");
    var displayDate = d3.timeFormat("%b %y");
    var displayValue = d3.format(",.0f");

    // Ordinal scale
    var x = d3.scaleTime()
        .range([0, width]);

		// Linear scale
    var y = d3.scaleLinear()
        .range([height, height - 200]);

    var line = d3.line()
        .x(function(d) { return x(d.date)+10; })
        .y(function(d) { return y(d.value); });

    var g = svg.append("g")
    	.attr("transform", "translate(0, 0)")

   	d3.json("dataset.json", function(error, data) {
	  	if (error) throw error;

      // Pre-processing
      data.forEach(function(d) {
				d.value = +d.value;
        d["date"] = parseDate(d["date"]);
      });

      x.domain(d3.extent(data, function(d) { return d.date; }));
			y.domain([0, d3.max(data, function(d) { return d.value; })]);

      svg.selectAll(".label").data(data).enter()
       .append("text")
      	.attr("class", "label")
        .text(function(d, i) { return displayDate(d.date); })
        .attr("y", 420)
        .attr("x", function(d) { return x(d.date); })
        .style("font-size", 10)
        .style("font-family", "monospace");

      // Display last value
      g.selectAll(".value").data([data[data.length -1]]).enter()
       .append("text")
        .text(function(d, i) { return displayValue(d.value); })
        .attr("class", "value")
        .attr("y", function(d) { return y(d.value); })
        .attr("x", width + 10)
        .style("font-size", 20)
        .style("font-family", "monospace");

      g.selectAll(".line").data([data]).enter().append("path")
        .attr("class", "line")
        .attr("d", line);
      svg.selectAll("dot")
        .data(data)
      	.enter().append("circle")
        .attr("r", 11)
        .attr("cx", function(d) { return x(d.date)+10; })
        .attr("cy", function(d) { return y(d.value); })
      	.style("fill","rgb(207,205,212)")
        .style("opacity",0.5)
      	.on("mouseover",function(d,i) {
        		d3.select(this).style("fill","red").style("opacity",1)

           svg.append("line")
        			.style("style","dashed")
        			.attr("id","l"+i)
        			.attr("x1", x(d.date)+10)
            		.attr("y1", height)
								.attr("x2", x(d.date)+10)
								.attr("y2", y(d.value))
            	.attr("stroke-dasharray",7)
        			.attr("stroke","black")
        			.attr("stroke-width",0.5)
           svg.append("text")
        			.attr("id","t"+i)
        			.attr("y", y(d.value)-15)
        			.attr("x", x(d.date))
        			.style("font-family", "monospace")
        			.style("font-size", 15)
        			.style("font-weight","bold")
        			.text(function() {return d.value;})
            	;})

      	.on("mouseout",function(d,i){
        		d3.select(this).style("fill","rgb(207,205,212)")
              .style("opacity",0.5)
            d3.select("#t"+i).remove()
            d3.select("#l"+i).remove()
            ;});
    });

  </script>
</body>
	[{"name": "A", "value": 10, "date": "2016-01"},
	{"name": "B", "value": 30, "date": "2016-02"},
	{"name": "C", "value": 20, "date": "2016-03"},
	{"name": "D", "value": 40, "date": "2016-04"},
	{"name": "E", "value": 50, "date": "2016-05"},
	{"name": "F", "value": 20, "date": "2016-06"},
	{"name": "G", "value": 10, "date": "2016-07"}
	]
	<!DOCTYPE html>
	<head>
	<meta charset="utf-8">
	<script src="https://d3js.org/d3.v4.min.js"></script>
	<style>
	.line {
	fill: none;
	stroke: black;
	stroke-width: 1.5px;
	}
	</style>
	</head>

	<body>
	<script>

	var svg = d3.select("body").append("svg")
	.attr("width", 960)
	.attr("height", 500);

	var width = 800;
	var height = 400;

	// See formats http://bl.ocks.org/zanarmstrong/raw/05c1e95bf7aa16c4768e/
	// Data sample {"name": "G", "value": 10, "date": "2016-07"}
	var parseDate = d3.timeParse("%Y-%m");
	var displayDate = d3.timeFormat("%b %y");
	var displayValue = d3.format(",.0f");

	// Ordinal scale
	var x = d3.scaleTime()
	.range([0, width]);

	// Linear scale
	var y = d3.scaleLinear()
	.range([height, height - 200]);

	var line = d3.line()
	.x(function(d) { return x(d.date)+10; })
	.y(function(d) { return y(d.value); });

	var g = svg.append("g")
	.attr("transform", "translate(0, 0)")

	d3.json("dataset.json", function(error, data) {
	if (error) throw error;

	// Pre-processing
	data.forEach(function(d) {
	d.value = +d.value;
	d["date"] = parseDate(d["date"]);
	});

	x.domain(d3.extent(data, function(d) { return d.date; }));
	y.domain([0, d3.max(data, function(d) { return d.value; })]);

	svg.selectAll(".label").data(data).enter()
	.append("text")
	.attr("class", "label")
	.text(function(d, i) { return displayDate(d.date); })
	.attr("y", 420)
	.attr("x", function(d) { return x(d.date); })
	.style("font-size", 10)
	.style("font-family", "monospace");

	// Display last value
	g.selectAll(".value").data([data[data.length -1]]).enter()
	.append("text")
	.text(function(d, i) { return displayValue(d.value); })
	.attr("class", "value")
	.attr("y", function(d) { return y(d.value); })
	.attr("x", width + 10)
	.style("font-size", 20)
	.style("font-family", "monospace");

	g.selectAll(".line").data([data]).enter().append("path")
	.attr("class", "line")
	.attr("d", line);
	svg.selectAll("dot")
	.data(data)
	.enter().append("circle")
	.attr("r", 11)
	.attr("cx", function(d) { return x(d.date)+10; })
	.attr("cy", function(d) { return y(d.value); })
	.style("fill","rgb(207,205,212)")
	.style("opacity",0.5)
	.on("mouseover",function(d,i) {
	d3.select(this).style("fill","red").style("opacity",1)

	svg.append("line")
	.style("style","dashed")
	.attr("id","l"+i)
	.attr("x1", x(d.date)+10)
	.attr("y1", height)
	.attr("x2", x(d.date)+10)
	.attr("y2", y(d.value))
	.attr("stroke-dasharray",7)
	.attr("stroke","black")
	.attr("stroke-width",0.5)
	svg.append("text")
	.attr("id","t"+i)
	.attr("y", y(d.value)-15)
	.attr("x", x(d.date))
	.style("font-family", "monospace")
	.style("font-size", 15)
	.style("font-weight","bold")
	.text(function() {return d.value;})
	;})

	.on("mouseout",function(d,i){
	d3.select(this).style("fill","rgb(207,205,212)")
	.style("opacity",0.5)
	d3.select("#t"+i).remove()
	d3.select("#l"+i).remove()
	;});
	});

	</script>
	</body>