data: {
table: 'freq',
startRow: 1,
endRow: 17,
endColumn: 7
},
Seeking assistance on how to implement JSON for a Wind rose polar highchart instead of using table data. https://jsfiddle.net/id10922606/26njzy7k/1/
Although I am arriving late to the discussion, I wanted to share the answer for anyone else who may come across this question. I also found it challenging to find the correct solution. The answers in related questions didn't quite hit the mark because they were using raw wind speeds instead of wind frequencies when working with polar wind roses without the table data from the highcharts demo example.
The polar version can be likened to a stacked columns chart, but imagine the x-axis wrapping around a circle. On the x-axis, we have the wind directions defined by the categories option. The y-axis represents the wind speed buckets. The series data is structured as follows:
//data series
{
//series 1
name: '10-20 kmph',
//essentially the frequencies for that wind speed across all directions
//e.g., 1.5% comes from N, 4.5% from NNE, 3.0% from NE, etc.
data: [1.5, 4.5, 3.0, 0 ... ]
},
{
//series 2
name: '20-30 kmph',
data: [1.2, 3.6, 0, .... ]
}
//and so on
Here is the code snippet I utilized to calculate the frequency data extracted via JSON:
//chart no.1 - wind rose
$scope.windRoseConfig = {
options: {
chart: { polar: true, type: 'column' },
yAxis: {
title: { text: 'Frequency' },
reversedStacks: false
},
plotOptions: {
series: {
stacking: 'normal',
shadow: false,
groupPadding: 0,
pointPlacement: 'on'
}
}
},
title: { text: 'Wind Rose' },
series: seriesData,
xAxis: {
tickmarkPlacement: 'on',
categories: [ "N", "NNE", "NE", "ENE", "E", "ESE", "SE", "SSE", "S", "SSW", "SW", "WSW", "W", "WNW", "NW", "NNW" ]
}
}
}
For a demonstration using JSON, click on this link: Demo
series: [
{
name: '10-20 kmph',
data: [1.5, 4.5, 3.0, 1.5, 4.5, 3.0, 1.5, 4.5, 3.0, 1.5, 4.5, 3.0, 1.5, 4.5, 3.0, 1.5]
},
{
name: '20-30 kmph',
data: [1.5, 4.5, 3.0, 1.5, 4.5, 3.0, 1.5, 4.5, 3.0, 1.5, 4.5, 3.0, 1.5, 4.5, 3.0, 1.5]
}
],
xAxis: {
tickmarkPlacement: 'on',
categories: ["N", "NNE", "NE", "ENE", "E", "ESE", "SE", "SSE", "S", "SSW", "SW", "WSW", "W", "WNW", "NW", "NNW"]
},
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