jjelosua/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Intro d3js

### Example15 - Transitions
Built with blockbuilder.org

  
## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Intro d3js examples</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
    <style>
      body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
      p.update:hover {
        cursor: pointer;
      }
    </style>
  </head>
  <body>
    <h1>Intro d3js - example15</h1>
    <p class="update">click this text to update the data.</p>
    <!--<p> previous paragraph</p>-->
    <script type="text/javascript">
    	//Width and height
      var w = 600;
      var h = 250;
      var offset = 10;

      var dataset = [ 5, 10, 13, 19, 21, 25, 22, 18, 15, 13,
              11, 12, 15, 20, 18, 17, 16, 18, 23, 25 ];

      var xScale = d3.scale.ordinal()
              .domain(d3.range(dataset.length))
              .rangeRoundBands([0, w], 0.05);

      var yScale = d3.scale.linear()
              .domain([0, d3.max(dataset)])
              .range([h, 0]);

      //Create SVG element
      var svg = d3.select("body")
            .append("svg")
            .attr("width", w)
            .attr("height", h);

      //Create bars
      svg.selectAll("rect")
         .data(dataset)
         .enter()
         .append("rect")
         .attr("x", function(d, i) {
             return xScale(i);
         })
         .attr("y", function(d) {
             return yScale(d);
         })
         .attr("width", xScale.rangeBand())
         .attr("height", function(d) {
             return h - yScale(d);
         })
         .attr("fill", function(d) {
          return "rgb(0, 0, " + (d * 10) + ")";
         });

      //Create labels
      svg.selectAll("text")
         .data(dataset)
         .enter()
         .append("text")
         .text(function(d) {
             return d;
         })
         .attr("text-anchor", "middle")
         .attr("x", function(d, i) {
             return xScale(i) + xScale.rangeBand() / 2;
         })
         .attr("y", function(d) {
             return yScale(d) + offset;
         })
         .attr("font-family", "sans-serif")
         .attr("font-size", "11px")
         .attr("fill", "white");

      //On click, update with new data
      d3.select("p")
        .on("click", function() {

          //New values for dataset
          var numValues = dataset.length;         //Count original length of dataset
          var maxValue = 200;                      //Highest possible new value
          dataset = [];                            //Initialize empty array
          for (var i = 0; i < numValues; i++) {    //Loop numValues times
            var newNumber = Math.floor(Math.random() * maxValue);  //New random integer (0-100)
            dataset.push(newNumber);               //Add new number to array
          }

          //Update scale domain
          //Recalibrate the scale domain, given the new max value in dataset
          yScale.domain([0, d3.max(dataset)]);

          //Update all rects
          svg.selectAll("rect")
             .data(dataset)
             .transition()
             .duration(500)
             .delay(function(d, i) {
                return i / dataset.length * 1000;
             })
             .attr("y", function(d) {
                 return yScale(d);
             })
             .attr("height", function(d) {
                 return h - yScale(d);
             })
             .attr("fill", function(d) {
              return "rgb(0, 0, " + (d * 10) + ")";
             });

          //Update all labels
          svg.selectAll("text")
             .data(dataset)
             .transition()
             .delay(function(d, i) {
               return i / dataset.length * 1000;
             })
             .duration(500)
             .text(function(d) {
                 return d;
             })
             .attr("x", function(d, i) {
                 return xScale(i) + xScale.rangeBand() / 2;
             })
             .attr("y", function(d) {
                 return yScale(d) + offset;
             });

        });
      </script>
  </body>
</html>

## thumbnail.png

      
    Raw
  

              thumbnail.png
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>Intro d3js examples</title>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
	<style>
	body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
	p.update:hover {
	cursor: pointer;
	}
	</style>
	</head>
	<body>
	<h1>Intro d3js - example15</h1>
	<p class="update">click this text to update the data.</p>
	<!--<p> previous paragraph</p>-->
	<script type="text/javascript">
	//Width and height
	var w = 600;
	var h = 250;
	var offset = 10;

	var dataset = [ 5, 10, 13, 19, 21, 25, 22, 18, 15, 13,
	11, 12, 15, 20, 18, 17, 16, 18, 23, 25 ];

	var xScale = d3.scale.ordinal()
	.domain(d3.range(dataset.length))
	.rangeRoundBands([0, w], 0.05);

	var yScale = d3.scale.linear()
	.domain([0, d3.max(dataset)])
	.range([h, 0]);

	//Create SVG element
	var svg = d3.select("body")
	.append("svg")
	.attr("width", w)
	.attr("height", h);

	//Create bars
	svg.selectAll("rect")
	.data(dataset)
	.enter()
	.append("rect")
	.attr("x", function(d, i) {
	return xScale(i);
	})
	.attr("y", function(d) {
	return yScale(d);
	})
	.attr("width", xScale.rangeBand())
	.attr("height", function(d) {
	return h - yScale(d);
	})
	.attr("fill", function(d) {
	return "rgb(0, 0, " + (d * 10) + ")";
	});

	//Create labels
	svg.selectAll("text")
	.data(dataset)
	.enter()
	.append("text")
	.text(function(d) {
	return d;
	})
	.attr("text-anchor", "middle")
	.attr("x", function(d, i) {
	return xScale(i) + xScale.rangeBand() / 2;
	})
	.attr("y", function(d) {
	return yScale(d) + offset;
	})
	.attr("font-family", "sans-serif")
	.attr("font-size", "11px")
	.attr("fill", "white");

	//On click, update with new data
	d3.select("p")
	.on("click", function() {

	//New values for dataset
	var numValues = dataset.length; //Count original length of dataset
	var maxValue = 200; //Highest possible new value
	dataset = []; //Initialize empty array
	for (var i = 0; i < numValues; i++) { //Loop numValues times
	var newNumber = Math.floor(Math.random() * maxValue); //New random integer (0-100)
	dataset.push(newNumber); //Add new number to array
	}

	//Update scale domain
	//Recalibrate the scale domain, given the new max value in dataset
	yScale.domain([0, d3.max(dataset)]);

	//Update all rects
	svg.selectAll("rect")
	.data(dataset)
	.transition()
	.duration(500)
	.delay(function(d, i) {
	return i / dataset.length * 1000;
	})
	.attr("y", function(d) {
	return yScale(d);
	})
	.attr("height", function(d) {
	return h - yScale(d);
	})
	.attr("fill", function(d) {
	return "rgb(0, 0, " + (d * 10) + ")";
	});

	//Update all labels
	svg.selectAll("text")
	.data(dataset)
	.transition()
	.delay(function(d, i) {
	return i / dataset.length * 1000;
	})
	.duration(500)
	.text(function(d) {
	return d;
	})
	.attr("x", function(d, i) {
	return xScale(i) + xScale.rangeBand() / 2;
	})
	.attr("y", function(d) {
	return yScale(d) + offset;
	});

	});
	</script>
	</body>
	</html>