Radar Plot Annual Temperature

Radar Plot Example

In the example we're looking at historical weather data for San Francisco provided by intellicast.com.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <link href='https://fonts.googleapis.com/css?family=Lato:300,900' rel='stylesheet' type='text/css'>

svg {
        background-color: white;
        font-family: 'Lato';
     }

.axis {
        stroke: white;
        opacity: .8;
     }

text.title {
        font-size: 26px;
     }

circle.axis {
        stroke: white;
        stroke-width: 1px;
        fill: none;
     }

circle.axis.record {
        stroke: #bae0d6;
        stroke-width: 1.2px;
        opacity: 1;
     }

line.record {
        stroke: #bae0d6;
        stroke-width: 3px;
     }

line.avg {
        stroke: #71C5AF;
        stroke-width: 3px;
     }

.avg {
        stroke: #71C5AF;
        fill: #71C5AF;
     }

.record {
        stroke: #bae0d6;
        fill: #bae0d6;
     }

</style>
</head>
<body>
    <svg width=960 height=500></svg>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3-legend/1.3.0/d3-legend.min.js"></script>

d3.json('temp.json', function(err, json){

angleScale.domain([0, json.length - 1]);

var min = d3.min(json, d => parseInt(d.recLow)),
        max = d3.max(json, d => parseInt(d.recHigh));

//circle axis
        origin.selectAll('circle.axis-green')
            .data([40, 60, 80, 100])
            .enter().append('circle')
            .attr('r', (d) => rScale(d))
            .attr('class', 'axis record')

//record low and high
        origin.selectAll('line.record')
          .data(json)
          .enter().append('line')
          .attr('x1', (d, i) => xScale(i, d.recLow))
          .attr('x2', (d, i) => xScale(i, d.recHigh))
          .attr('y1', (d, i) => yScale(i, d.recLow))
          .attr('y2', (d, i) => yScale(i, d.recHigh))
          .attr('class', 'record');

//avg low and high
        origin.selectAll('line.avg')
          .data(json)
          .enter().append('line')
          .attr('x1', (d, i) => xScale(i, d.avgLow))
          .attr('x2', (d, i) => xScale(i, d.avgHigh))
          .attr('y1', (d, i) => yScale(i, d.avgLow))
          .attr('y2', (d, i) => yScale(i, d.avgHigh))
          .attr('class', 'avg');

origin.selectAll('circle.axis-white')
            .data([40, 60, 80, 100])
            .enter().append('circle')
            .attr('r', (d) => rScale(d))
            .attr('class', 'axis')

//axis lines
        origin.selectAll('line.axis')
          .data(months)
          .enter().append('line')
          .attr('x2', d => {
            return xScale(d.index, 120)})
          .attr('y2', d => -yScale(d.index, 120))
          .attr('class', 'axis');

//center for reference
        origin.append('circle')
            .attr('r', 3)
            .attr('class', 'avg')

//title
        svg.append('text')
            .attr('x', 30)
            .attr('y', 60)
            .text('San Francisco')
            .attr('class', 'title')

//subtitle
        svg.append('text')
            .attr('x', 30)
            .attr('y', 100)
            .text('Historical Weather Data')

//create legend
        var legendScale = d3.scale.ordinal()
            .domain(['Record', 'Average'])
            .range(['record', 'avg'])

//d3-legend
        var legend = d3.legend.color()
            .shapePadding(5)
            .useClass(true)
            .scale(legendScale);

svg.append('g')
            .attr('transform', 'translate(30,120)')
            .call(legend);

});

</script>
</body>
</html>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.js

https://cdnjs.cloudflare.com/ajax/libs/d3-legend/1.3.0/d3-legend.min.js