NVD3 - How to refresh the data function to product new data on click

d3.js, javascript, nvd3.js

Solution

Here is what I did differently with your code.

// Maintian an instance of the chart 
var chart; 

// Maintain an Instance of the SVG selection with its data
var chartData;

nv.addGraph(function() {
    chart = nv.models.lineChart().margin({
        top : 5,
        right : 10,
        bottom : 38,
        left : 10
    }).color(["lightgrey", "rgba(242,94,34,0.58)"])
        .useInteractiveGuideline(false)
        .transitionDuration(350)
        .showLegend(true).showYAxis(false)
        .showXAxis(true).forceY([0.4, 1.6]);

    chart.xAxis.tickFormat(d3.format('d')).axisLabel("Rounds");
    chart.yAxis.tickFormat(d3.format('0.1f'));

    var data = economyData();

    // Assign the SVG selction
    chartData = d3.select('#economyChart svg').datum(data);
    chartData.transition().duration(500).call(chart);

    nv.utils.windowResize(chart.update);

    return chart;
});

Here's how the `update()` function looks like:

function update() {
    var data = economyData();

    // Update the SVG with the new data and call chart
    chartData.datum(data).transition().duration(500).call(chart);
    nv.utils.windowResize(chart.update);
};

// Update the CHART
d3.select("#update").on("click", update);

Here is a link to a working version of your code.

Hope it helps.

Problem

I have a line chart and every time the page refresh it changes the data, which is great but I need to to refresh by a user click. This is because there will eventually be other input fields on the page and refreshing the page would destroy their current session. jsfiddle - http://jsfiddle.net/darcyvoutt/dXtv2/ Here is the code setup to create the line: ``` function economyData() { // Rounds var numRounds = 10; // Stability of economy var stable = 0.2; var unstable = 0.6; var stability = unstable; // Type of economy var boom = 0.02; var flat = 0; var poor = -0.02; var economyTrend = boom; // Range var start = 1; var max = start + stability; var min = start - stability; // Arrays var baseLine = []; var economy = []; // Loop for (var i = 0; i < numRounds + 1; i++) { baseLine.push({x: i, y: 1}); if (i == 0) { economyValue = 1; } else { var curve = Math.min(Math.max( start + ((Math.random() - 0.5) * stability), min), max); economyValue = Math.round( ((1 + (economyTrend * i)) * curve) * 100) / 100; } economy.push({x: i, y: economyValue}); } return [ { key: 'Base Line', values: baseLine }, { key: 'Economy', values: economy } ]; } ``` Here is what I tried to write but failed for updating: ``` function update() { sel = svg.selectAll(".nv-line") .datum(data); sel .exit() .remove(); sel .enter() .append('path') .attr('class','.nv-line'); sel .transition().duration(1000); }; d3.select("#update").on("click", data); ```

Original source