d3.js - chart.xAxis .tickFormat formatting is not working -

i pretty new d3, have spent last 5 hours trying figure out how make works , have tried thousand of combinations.

this json want use:

var histcatexplong = [   {     "key" : "consumer discretionary" ,     "values" : [ [ 20131201 , 27.38478809681],[ 20131202 , 27.38478809681], [ 20131203 , 27.38478809681]]   } ,   {     "key" : "consumer staples" ,     "values" : [ [ 20131201 , 7.2800122043237],[ 20131202 , 27.38478809681], [ 20131203 , 27.38478809681]]   } ]; 

in dates formatted yyyymmdd.

this has been last desperate trial far:

   chart.xaxis   .tickformat(function(d) {    var startdate = tostring(d)   var parser = d3.time.format("%y%m%d"); var formatter = d3.time.format("%x"); var startdatestring = formatter(parser.parse(startdate)); return startdatestring}); 

any help, please more welcome!

the complete code not working here:

<script src="../lib/d3.v3.js"></script> <script src="../nv.d3.js"></script> <script src="../src/utils.js"></script> <script src="../src/models/axis.js"></script> <script src="../src/tooltip.js"></script> <script src="../src/interactivelayer.js"></script> <script src="../src/models/legend.js"></script> <script src="../src/models/axis.js"></script> <script src="../src/models/scatter.js"></script> <script src="../src/models/stackedarea.js"></script> <script src="../src/models/stackedareachart.js"></script> <script>     // testing single data point var histcatexplong = [   {     "key" : "consumer discretionary" ,     "values" : [ [ 20131201 , 27.38478809681],[ 20131202 , 27.38478809681], [ 20131203 , 27.38478809681]]   } ,   {     "key" : "consumer staples" ,     "values" : [ [ 20131201 , 7.2800122043237],[ 20131202 , 27.38478809681], [ 20131203 , 27.38478809681]]   } ];    .map(function(series) {   series.values = series.values.map(function(d) {     return { x: d[0], y: d[1] }   });   return series; }); */  //an example of harmonizing colors between visualizations //observe consumer discretionary , consumer staples have //been flipped in second chart var colors = d3.scale.category20(); keycolor = function(d, i) {return colors(d.key)};   nv.addgraph(function() {   chart = nv.models.stackedareachart()                // .width(600).height(500)                 .useinteractiveguideline(true)                 .x(function(d) { return d[0] })                 .y(function(d) { return d[1] })                 .color(keycolor)                 .transitionduration(300);                 //.clipedge(true);  // chart.stacked.scatter.clipvoronoi(false);    chart.xaxis       .tickformat(function(d) {   var startdate = tostring(d)   var parser = d3.time.format("%y%m%d");   var formatter = d3.time.format("%x");    var startdatestring = formatter(parser.parse(startdate));     return startdatestring});    chart.yaxis       .tickformat(d3.format(',.2f'));    d3.select('#chart1')     .datum(histcatexplong)     .transition().duration(1000)     .call(chart)     // .transition().duration(0)     .each('start', function() {         settimeout(function() {             d3.selectall('#chart1 *').each(function() {               console.log('start',this.__transition__, this)               // while(this.__transition__)               if(this.__transition__)                 this.__transition__.duration = 1;             })           }, 0)       })     // .each('end', function() {     //         d3.selectall('#chart1 *').each(function() {     //           console.log('end', this.__transition__, this)     //           // while(this.__transition__)     //           if(this.__transition__)     //             this.__transition__.duration = 1;     //         })});    nv.utils.windowresize(chart.update);    // chart.dispatch.on('statechange', function(e) { nv.log('new state:', json.stringify(e)); });    return chart; });      </script> 

i parse dates before else data. way, can use usual formatting functions. code this:

var parser = d3.time.format("%y%m%d"); histcatexplong.foreach(function(d) {   d.values.foreach(function(e) {     e[0] = parser.parse("" + e[0]);   }); });