javascript - d3 Line Chart animations from left to right -


line chart growth

i interested create line chart -- draws left right -- connecting dots in x-axis.

http://bl.ocks.org/markmarkoh/8700606 http://bl.ocks.org/duopixel/4063326

this jsfiddle i've made start creating chart. http://jsfiddle.net/nyeax/1512/

//__invoke line $('[data-role="line"]').each(function(index) {   createline(this); });    function createline(el){     var w = $(el).data("width");     var h = $(el).data("height");      var svg = d3.select($(el)[0])       .append("svg")       .attr("width", w)       .attr("height", h);      var data = d3.range(11).map(function(){return math.random()*10})     var x = d3.scale.linear().domain([0, 10]).range([0, 700]);     var y = d3.scale.linear().domain([0, 10]).range([10, 290]);     var line = d3.svg.line()       .interpolate("cardinal")       .x(function(d,i) {return x(i);})       .y(function(d) {return y(d);})      var path = svg.append("path")       .attr("d", line(data))       .attr("stroke", "steelblue")       .attr("stroke-width", "2")       .attr("fill", "none");      var totallength = path.node().gettotallength();      path       .attr("stroke-dasharray", totallength + " " + totallength)       .attr("stroke-dashoffset", totallength)       .transition()         .duration(2000)         .ease("linear")         .attr("stroke-dashoffset", 0);      svg.on("click", function(){       path               .transition()         .duration(2000)         .ease("linear")         .attr("stroke-dashoffset", totallength);     });        /* plot axis */     var padding = 100; // space around chart, not including labels      // define x axis     var xaxis = d3.svg.axis()         .orient("bottom")         .scale(x);         //.tickformat(date_format);      // draw x axis labels , move bottom of chart area         svg.append("g")             .attr("class", "xaxis axis")  // 2 classes, 1 css formatting, 1 selection below             .attr("transform", "translate(0," + (h - padding) + ")")             .call(xaxis);      /* plot axis */ }

one solution can append svg circles correspond path before drawing path. example fiddle: http://jsfiddle.net/stancheta/ystymlm4/6/

    var circles = svg.selectall("dot")       .data(data)       .enter().append("svg:circle")       .attr('class', 'circ')       .attr("r", 3)       .attr("cx", function(d, i) { return x(i); })       .attr("cy", function(d, i) { return y(d); })       .style('fill', 'lightsteelblue');

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