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- Question: How to create gauge chart in d3 js react?
- Time: Asked 141 hours ago
- Modified: Asked 53 days ago
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How to create gauge chart in d3 js react?
To create a gauge chart in d3.js with React, you can follow these steps:
- Install D3.js and React-D3-Library:
npm install d3 react-d3-library
- Import the required modules:
javascriptimport React from 'react'; import { Gauge } from 'react-d3-library'; import * as d3 from 'd3';
- Define the component:
javascriptclass GaugeChart extends React.Component { render() { // Set up the data const data = [ { value: 50, label: 'Label 1' }, { value: 75, label: 'Label 2' }, { value: 100, label: 'Label 3' } ]; // Set up the scale const minVal = 0; const maxVal = 100; const tickStep = 10; const range = maxVal - minVal; const tickValues = d3.range(minVal, maxVal + tickStep, tickStep); const colorScale = d3.scaleLinear() .domain([0, range / 2, range]) .range(['#FF0000', '#FFA500', '#00FF00']); // Set up the arc const arc = d3.arc() .innerRadius(40) .outerRadius(100) .startAngle(-Math.PI / 2); // Set up the gauge const gauge = (selection) => { selection.each(function() { const svg = d3.select(this); const width = +svg.attr('width'); const height = +svg.attr('height'); // Create the gauge group const gaugeGroup = svg.append('g') .attr('transform', `translate(${width / 2},${height / 2})`); // Create the ticks gaugeGroup.selectAll('.tick') .data(tickValues) .enter().append('line') .attr('class', 'tick') .attr('x1', 0) .attr('y1', -95) .attr('x2', 0) .attr('y2', function(d) { return d % 20 === 0 ? -90 : -85 }) .attr('stroke', '#000') .attr('stroke-width', function(d) { return d % 20 === 0 ? 3 : 1 }); // Create the labels gaugeGroup.selectAll('.tick-label') .data(tickValues) .enter().append('text') .attr('class', 'tick-label') .attr('x', 0) .attr('y', function(d) { return -80 - (d % 20 === 0 ? 15 : 10) }) .attr('text-anchor', 'middle') .text(function(d) { return d }); // Create the arcs data.forEach(function(d) { const value = d.value; const label = d.label; const endAngle = arc((value / maxVal) * Math.PI); gaugeGroup.append('path') .datum({endAngle: endAngle}) .style('fill', colorScale(value)) .attr('d', arc) .append('title') .text(label); }); // Create the needle const needle = gaugeGroup.append('g') .attr('class', 'needle') .attr('transform', 'rotate(-90)'); needle.append('path') .attr('d', 'M0,-5L0,5
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