[D3js] Histogrammes décalés

**benjamin_malaussene** · 22/06/2016, 19h13

Bonjour j'ai fait un graphique avec la librairie d3, mais mes histogrammes sont décalés par rapport aux axes verticaux, et la ligne tout à gauche est trop grande, est-ce que vous pourriez m'aider à corriger ça svp ? Merci !

Code :

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta name="description" content="">
    <meta name="author" content="">
 
    <title>Positive and Negative Value Bar Chart</title>
 
 
    <script type="text/javascript" src="http://d3js.org/d3.v3.min.js"></script>
   <script src="https://code.jquery.com/jquery-1.10.2.min.js"></script>
   <style>
   body{
	font-family: sans-serif;
}
.positive{
		fill: lightsteelblue;
		fill-opacity: 0.9;
	}
.negative{
		fill: darkred;
		fill-opacity: 0.9;
	}
.axis path,
.axis line {
			fill: none;
			stroke: black;
			shape-rendering: crispEdges;
	}
.axis text {
			font-family: sans-serif;
			font-size: 10px;	
	}
div.tooltip {   
	  position: absolute;     
	  text-align: center;
	  vertical-align: middle;   
	  width: 150px;                  
	  height: 50px;                 
	  padding: 5px; 
	  color: #000000;          
	  font-size: 12px;     
	  background: #FFF;
	  box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.4);
	  border: 2px;  
	  border-radius: 8px;  
	  pointer-events: none;                  
	} 
li{
	overflow:hidden;
	display: inline-block;
}
ul{
	padding-left: 0;
	padding-right: 0;
}
#chart-container{
	float:left;
}
   </style>
  </head>
 
  <body>
  <div class ="description">
            <table>
          <tr>
            <td>
              <select>
                <option id="item" value="demand">Demand Ride Percent Change</option>
                <option id="item" value="bus">Bus Ride Percent Change</option>
              </select>
            </td>
        </tr>
        <tr>
              <td>
                <ul>
                  <li><input type="checkbox" class="checkbox" name="check" value="sort"> </li>
                  <li>Sort by percent change</li>
                </ul>
              </div>
            </td>
 
        </tr>
          </table>
      </div>
      <br>
      <div id="chart-container"></div>
       <script>
	   var dataset;
 
//Define bar chart function 
	function barChart(dataset){	
 
		//Set width and height as fixed variables
		var w = 1000;
		var h = 1000;
		var padding = 40;
		//Scale function for axes and radius
		var yScale = d3.scale.linear()
						.domain(d3.extent(dataset, function(d){return d.lundi;}))
						//.range([w+padding,padding]);
						//.range([d3.min(dataset, function(d) { return d.lundi;}),d3.max(dataset, function(d) { return d.lundi;})]);
	                    .range([500+padding,padding]); //pourquoi dansz ce sens ?
						//.range([h,0]);
		/*var xScale = d3.scale.ordinal()
						.domain(dataset.map(function(d){ return d.horaire;}))
						.rangeRoundBands([padding,w]); //poruquoi round ? pourquoi xCale et axisScale ? */
 
 
 
		//To format axis as a percent
		//var formatPercent = d3.format("%1");
 
		//Create y axis
		var yAxis = d3.svg.axis().scale(yScale).orient("left").ticks(10);
 
 
		var axisScale =  d3.scale.ordinal()
						.domain(dataset.map(function(d){ return d.horaire;}))
						//.rangeRoundBands([padding,w],0.15); //pourquoi intervalle de 0.5  et round ?
						.rangeRoundBands([padding,w])
						//.rangePoints([padding,w]);
        var xAxis = d3.svg.axis().scale(axisScale)/*.tickValues(10)*/.tickValues(axisScale.domain().filter(function(d, i) { return !(i % 4); }));
 
 
 
 
		//Define key function
		var key = function(d){return d.horaire};
 
		//Define tooltip for hover-over info windows
		var div = d3.select("body").append("div")   
  							.attr("class", "tooltip")               
  							.style("opacity", 0);
 
		//Create svg element
		var svg = d3.select("#chart-container").append("svg")
				.attr("width", w).attr("height", h)
				.attr("id", "chart")
				.attr("viewBox", "0 0 "+w+ " "+h) // pour le responsive
				.attr("preserveAspectRatio", "xMinYMin");
		//console.log("TARGET   ");
		//Resizing function to maintain aspect ratio (uses jquery)
		//var targetWidth2 = $("body").width();
		var aspect = w / h;
		var chart = $("#chart");
			$(window).on("resize", function() {
			    var targetWidth = $("body").width();
			   	//console.log("TARGET   "+targetWidth2);
 
	    		if(targetWidth<w){
	    			chart.attr("width", targetWidth); 
	    			chart.attr("height", targetWidth / aspect); 			
	    		}
	    		else{
 
	    			chart.attr("width", w);  
	    			chart.attr("height", w / aspect);	//pourquoi ?
	    		}
 
			});
 
 
		//Initialize state of chart according to drop down menu
		var state = d3.selectAll("option");
 
		//Create barchart
		svg.selectAll("rect")
			.data(dataset, key)
			.enter()
		  	.append("rect")
		    .attr("class", function(d){return d.lundi < 0 ? "negative" : "positive";})
		    .attr({
		    	x: function(d){
					//console.log("X :"+xScale(d.horaire));
		    		return axisScale(d.horaire);
		    	},
 
 
		    	y: function(d){
					console.log("Y :"+yScale(Math.max(0, d.lundi)));
		    		return yScale(Math.max(0, d.lundi));  
		    	},
		    	width: axisScale.rangeBand(),
		    	height: function(d){
		    		return Math.abs(yScale(d.lundi) - yScale(0)); 	//pourquoi ?
		    	}
		    })
		    .on('mouseover', function(d){
							d3.select(this)
							    .style("opacity", 0.2)
							    .style("stroke", "black")
 
					var info = div
							    .style("opacity", 1)
							    .style("left", (d3.event.pageX+10) + "px")
							    .style("top", (d3.event.pageY-30) + "px")
							    .text(d.horaire);
 
					if(state[0][0].selected){
						info.append("p")
							    .text(/*formatPercent(*/d.lundi/*)*/);
 
					}
					else if(state[0][1].selected){
						info.append("p")
							    .text(formatPercent(d.horaire));
					}
 
 
 
						})
        				.on('mouseout', function(d){
        					d3.select(this)
							.style({'stroke-opacity':0.5,'stroke':'#a8a8a8'})
							.style("opacity",1);
 
							div
	    						.style("opacity", 0);
        				});
 
		//Add y-axis
		svg.append("g")
				.attr("class", "y axis")
				.attr("transform", "translate(40,0)") //padding = 40
				.call(yAxis);
 
		svg.append("g")
				.attr("class", "x axis")
				.attr("transform", "translate(0,0)")
				/*.selectAll('path')
				.style({fill: 'none', stroke: "#3c763d"})
				.selectAll('line')
				.style({stroke: "#3c763d"})*/
				.call(xAxis);
 
		//svg.append("g")
			//	.attr("width", 100)
              //  .attr("height", 0)
				//.call(xAxis);	
 
		svg.selectAll("line.horizontalGrid").data(yScale.ticks(10)).enter()
		.append("line")
        .attr(
        {
            "class":"horizontalGrid",
            "x1" : padding,
            "x2" : w,
            "y1" : function(d){ return yScale(d);},
            "y2" : function(d){ return yScale(d);},
            "fill" : "none",
            "shape-rendering" : "crispEdges",
            "stroke" : "black",
            "stroke-width" : "1px"
        });
console.log('test' + axisScale(dataset[0].horaire));
		/*svg.selectAll("g").append("line.verticalGrid").data("08:00").append("line").attr(
        {
            "class":"verticalGrid",
            "x1" : axisScale(dataset[0].horaire),
            "x2" : axisScale(dataset[0].horaire),
            "y1" : 0,
            "y2" : h,
            "fill" : "none",
            "shape-rendering" : "crispEdges",
            "stroke" : "black",
            "stroke-width" : "1px"
        });*/
 
/*svg.selectAll("line.verticalGrid").data(axisScale.ticks(axisScale.domain().filter(function(d, i) { return !(i % 4)}))).enter()
    .append("line")
        .attr(
        {
            "class":"verticalGrid",
            "x1" : function(d){ return axisScale(d);},
            "x2" : function(d){ return axisScale(d);},
            "y1" : 0,
            "y2" : h,
            "fill" : "none",
            "shape-rendering" : "crispEdges",
            "stroke" : "black",
            "stroke-width" : "1px"
        });*/
 
        svg.selectAll("g").append("line")
       .attr("x1",axisScale(dataset[0].horaire- padding) )  //<<== change your code here
       .attr("y1", 0)
       .attr("x2", axisScale(dataset[0].horaire - padding))  //<<== and here
       .attr("y2", 500 )
		//Sort data when sort is checked
		d3.selectAll(".checkbox").
		on("change", function(){
			console.log("sss");
			var x0 = axisScale.domain(dataset.sort(sortChoice())
			.map(function(d){return d.horaire}))
			.copy();
 
			var transition = svg.transition().duration(750);
			var delay = function(d, i){return i*10;};
 
			transition.selectAll("rect")
			.delay(delay)
			.attr("x", function(d){return x0(d.horaire);});
 
		})
 
		//Function to sort data when sort box is checked
		function sortChoice(){
				var state = d3.selectAll("option");
				var sort = d3.selectAll(".checkbox");
 
				if(sort[0][0].checked && state[0][0].selected){
				    console.log("begin");
					var out = function(a,b){
						return b.lundi - a.lundi; // ?
						}
						//console.log(out);
					return out;
				}
				/*else if(sort[0][0].checked && state[0][1].selected){
					var out = function(a,b){return b.bus_change - a.bus_change;}
					return out;
				}*/
				else{
				     console.log("return");
					var out = function(a,b){return d3.ascending(a.horaire, b.horaire);}
					return out;
 
				}
		};
 
		//Change data to correct values on input change
		//thid for second choice
		/*
			d3.selectAll("select").
			on("change", function() {
 
				var value= this.value;
				console.log("val: "+value);
 
				if(value=="bus"){
					var x_value = function(d){return d.bus_change;};
					var color = function(d){return d.bus_change < 0 ? "negative" : "positive";};
					var y_value = function(d){
			    		return yScale(Math.max(0, d.bus_change)); 
			    	};
			    	var height_value = function(d){
			    		return Math.abs(yScale(d.bus_change) - yScale(0));
			    	};	
				}
				else if(value=="demand"){
					var x_value = function(d){return d.lundi;};
					var color = function(d){return d.lundi < 0 ? "negative" : "positive";};
					var y_value = function(d){
			    		return yScale(Math.max(0, d.lundi)); 
			    	};
			    	var height_value = function(d){
			    		return Math.abs(yScale(d.lundi) - yScale(0)); 
			    	};	
				}
 
				//Update y scale
				yScale.domain(d3.extent(dataset, x_value));
 
				//Update with correct data
				var rect = svg.selectAll("rect").data(dataset, key);
				rect.exit().remove();
 
				//Transition chart to new data
				rect
				.transition()
				.duration(2000)
				.ease("linear")
				.each("start", function(){
					d3.select(this)
					.attr("width", "0.2")
					.attr("class", color)
				})
				.attr({
			    	x: function(d){
			    		return xScale(d.horaire);
			    	},
			    	y: y_value,
			    	width: xScale.rangeBand(),
			    	height: height_value
 
				});
 
				//Update y-axis
				svg.select(".y.axis")
					.transition()
					.duration(1000)
					.ease("linear")
					.call(yAxis);
			});*/
 
	};
 
	//Load data and call bar chart function 
		d3.csv("transportation_change_2012-2013_small.csv", function(error,data){
				if(error){
					console.log(error);
				}
				else{
					data.forEach(function(d) {
						d.lundi = parseFloat(d.lundi);
 
					});
					console.log(data.length); // ?
					dataset=data;
					barChart(dataset);
				}
			});
 
	   </script>
    </div>
  </body>
  </html>

Fichier csv :

Code :

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horaire,lundi,mardi,mercredi,jeudi,vendredi,samedi,dimanche
00:00,4,0,0,0,0,0,0
00:15,0,0,0,0,0,0,0
00:30,0,0,0,0,0,0,0
00:45,0,0,0,0,0,0,0
01:00,0,0,0,0,0,0,0
01:15,0,0,0,0,0,0,0
01:30,0,0,0,0,0,0,0
01:45,0,0,0,0,0,0,0
02:00,0,0,0,0,0,0,0
02:15,0,0,0,0,0,0,0
02:30,0,0,0,0,0,0,0
02:45,0,0,0,0,0,0,0
03:00,0,0,0,0,0,0,0
03:15,0,0,0,0,0,0,0
03:30,0,0,0,0,0,0,0
03:45,0,0,0,0,0,0,0
04:00,0,0,0,0,0,0,0
04:15,0,0,0,0,0,0,0
04:30,0,0,0,0,0,0,0
04:45,0,0,0,0,0,0,0
05:00,0,0,0,0,0,0,0
05:15,0,0,0,0,0,0,0
05:30,0,0,0,0,0,0,0
05:45,0,0,0,0,0,0,0
06:00,0,0,0,0,0,0,0
06:15,0,0,0,0,0,0,0
06:30,0,0,0,0,0,0,0
06:45,0,0,0,0,0,0,0
07:00,0,0,0,0,0,0,0
07:15,0,0,0,0,0,0,0
07:30,0,0,0,0,0,0,0
07:45,0,0,0,0,0,0,0
08:00,1,1,1,1,1,1,0
08:15,1,1,1,1,1,1,0
08:30,6,5,7,3,5,4,0
08:45,5,5,6,4,6,5,0
09:00,52,50,47,55,53,38,0
09:15,56,51,62,57,54,41,0
09:30,60,64,67,64,57,54,0
09:45,85,72,77,69,63,64,0
10:00,80,87,74,82,71,75,14
10:15,80,90,87,87,84,77,14
10:30,80,85,85,92,83,78,14
10:45,83,87,90,89,83,79,14
11:00,86,89,78,81,84,81,14
11:15,89,83,77,79,80,83,14
11:30,89,84,74,83,78,77,14
11:45,88,92,76,81,75,72,14
12:00,78,83,62,77,69,63,13
12:15,77,64,54,63,55,52,13
12:30,61,58,52,55,48,52,12
12:45,58,53,48,50,45,43,12
13:00,58,57,45,50,41,44,12
13:15,58,57,45,45,45,40,12
13:30,55,57,42,47,49,42,12
13:45,52,61,43,56,53,48,12
14:00,71,64,59,70,68,49,13
14:15,71,72,72,83,71,62,14
14:30,81,73,87,83,76,72,14
14:45,77,90,90,86,76,77,14
15:00,82,95,90,91,74,74,14
15:15,86,96,92,77,79,72,14
15:30,89,92,88,78,83,72,14
15:45,93,90,82,83,78,74,14
16:00,101,87,85,80,79,78,14
16:15,100,90,89,84,83,77,14
16:30,98,92,89,82,83,78,14
16:45,88,86,91,83,86,72,14
17:00,90,89,91,81,80,66,14
17:15,87,90,86,73,81,61,14
17:30,86,90,86,77,73,59,14
17:45,88,93,91,64,70,52,14
18:00,78,83,68,65,56,33,11
18:15,74,77,67,67,54,30,11
18:30,58,54,51,49,44,25,11
18:45,47,50,50,44,35,23,11
19:00,12,17,14,12,17,11,11
19:15,12,11,15,11,13,10,11
19:30,9,7,11,9,8,7,11
19:45,9,7,11,9,9,7,11
20:00,4,4,3,4,4,3,5
20:15,4,4,3,4,4,3,5
20:30,4,4,3,4,4,3,5
20:45,4,4,3,4,4,3,5
21:00,4,4,3,4,4,3,0
21:15,4,4,3,4,4,3,0
21:30,1,1,1,1,1,1,0
21:45,1,1,1,1,1,1,0
22:00,0,0,0,0,0,0,0
22:15,0,0,0,0,0,0,0
22:30,0,0,0,0,0,0,0
22:45,0,0,0,0,0,0,0
23:00,0,0,0,0,0,0,0
23:15,0,0,0,0,0,0,0
23:30,0,0,0,0,0,0,0
23:45,4,0,0,0,0,0,0

**NoSmoking** · 23/06/2016, 21h59

Bonjour,
j'ai repérer au moins deux choses

• pourquoi 2 fois le padding, cela fait que la ligne de base n'est pas sur l'axe des X.

Code :

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.range([500+padding,padding]); //pourquoi dansz ce sens ?

• pourquoi mettre un var h = 1000 alors que ton graphe ne fait que 500 de haut.

mes histogrammes sont décalés par rapport aux axes verticaux

là je ne vois rien d'anormal, les barres sont centrées sur les lignes verticales des heures.

[D3js] Histogrammes décalés

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