Could I customize the color of the sectors in my radar chart to resemble this specific image?
https://i.stack.imgur.com/U8RAb.png
Is it feasible to achieve this using Chart.js? Alternatively, are there other chart libraries that have this capability?
It would be ideal if the solution is compatible with AngularJS.
Saurabh's answer may not be effective as it could cover up the labels and create varying areas for each sector in a radar chart, according to this source.
Alternatively, in my scenario utilizing angular-chart, I prepended my dataset with data corresponding to each sector. By utilizing a color object, I was able to achieve the desired visual appearance.
The construction of the data in angular goes as follows:
<canvas id="spider_chart" class="chart chart-base" chart-type="'Radar'"
chart-data="angular_spider_chart.data"
chart-options="angular_spider_chart.options"
chart-labels="angular_spider_chart.labels"
chart-series="angular_spider_chart.series"
chart-colours="angular_spider_chart.colors">
</canvas>
<script>
function makeList(n, v){
// Generating a list of data points with n instances of value v
var x = [];
for (; n>0; x[--n] = v);
return x;
}
function getColour (colour) {
// Returning a color object to replace the default angular-chart getColour function
return {
fillColor: colour,
strokeColor: colour,
pointColor: colour,
pointStrokeColor: '#fff',
pointHighlightFill: '#fff',
pointHighlightStroke: colour
};
}
// Setting up spider chart
function initialize_spider_chart (chart_data, label){
// Define the colors for the datasets
var colors = ["#000"];
var labels = [];
var data = [];
var series = []
// Disabling animation to prevent "belts" from animating
var options = {title: {display: true, text:label},
scaleLineWidth :1,
scaleShowLabels : false,
pointDot : false,
angleLineColor: "#e6e6e6",
borderColor: "#737373",
backgroundColor: '#cccccc',
animation: false,
showTooltips: false
};
// Values and colors for the sectors in the background
var belts = [[4, '#ef5350'], [3, '#ffaa00'], [2, '#00b19d'], [1, '#228bdf']];
for (var idx in belts){
var cp = belts[idx];
data.push(makeList(chart_data.length, cp[0]));
series.push("")
colors.unshift(getColour(cp[1]))
}
var actual_data = [];
for (var c in chart_data){
labels.push(chart_data[c].name);
actual_data.push(chart_data[c].value);
}
series.push('Banded Radar Chart');
data.push(actual_data);
return {'data': data,
'labels': labels,
'options': options,
'colors': colors,
'series': series
};
};
</script>
This setup yields the following result:
You can manipulate it by adjusting the scaleline size.
Experiment with the scaleLineWidth to meet your needs, like so:
var radarOptions = {
scaleLineWidth :16 ,
}
Gradually increase the scaleLineWidth until the gap between lines is filled.
You can also customize the scaleLineColor for a background effect,
var radarOptions = {
scaleLineWidth :16 ,
scaleLineColor : "#EEEEEE"
}
With Chart.JS and its datasets feature, you have the freedom to create a radar diagram with customizable sectors to suit your preferences.
"datasets": [
{
"backgroundColor": "rgba(94, 221, 46, 0)",
"borderColor": "rgb(126, 255, 16)",
"pointBackgroundColor": "#7eff10",
"borderWidth": 2,
"pointRadius": 4,
"data": [
30,
62,
80,
30
]
},
// More customization options for different sectors in the radar diagram
]
To see the complete version of the chart and how it appears, visit my fiddle: https://jsfiddle.net/rb38n490/5/
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