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React Charts & Graphs with Logarithmic Axis

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Logarithmic axes are useful while analyzing scientific / mathematical data. Its used to render non-linear scale when there is a large range of datapoint values. Below example shows line chart with logarithmic axis along with source code that you can try running locally.

  • React Code
/* App.js */
import React, { Component } from 'react';
import CanvasJSReact from '@canvasjs/react-charts';
//var CanvasJSReact = require('@canvasjs/react-charts');

var CanvasJS = CanvasJSReact.CanvasJS;
var CanvasJSChart = CanvasJSReact.CanvasJSChart;

class App extends Component {	
	render() {
		const options = {
			animationEnabled: true,
			theme: "light2",
			title: {
				text: "Growth of Photovoltaics"
			},
			axisY: {
				title: "Capacity (in MWp)",
				logarithmic: true
			},
			data: [{
				type: "spline",
				showInLegend: true,
				legendText: "MWp = one megawatt peak",
				dataPoints: [
				  { x: new Date(2001, 0), y: 1615},
				  { x: new Date(2002, 0), y: 2069},
				  { x: new Date(2003, 0), y: 2635},
				  { x: new Date(2004, 0), y: 3723},
				  { x: new Date(2005, 0), y: 5112},
				  { x: new Date(2006, 0), y: 6660},
				  { x: new Date(2007, 0), y: 9183},
				  { x: new Date(2008, 0), y: 15844},
				  { x: new Date(2009, 0), y: 23185},
				  { x: new Date(2010, 0), y: 40336},
				  { x: new Date(2011, 0), y: 70469},
				  { x: new Date(2012, 0), y: 100504},
				  { x: new Date(2013, 0), y: 138856},
				  { x: new Date(2014, 0), y: 178391},
				  { x: new Date(2015, 0), y: 229300},
				  { x: new Date(2016, 0), y: 302300},
				  { x: new Date(2017, 0), y: 405000}   
				]
			}]
		}
		
		return (
		<div>
			<CanvasJSChart options = {options} 
				/* onRef={ref => this.chart = ref} */
			/>
			{/*You can get reference to the chart instance as shown above using onRef. This allows you to access all chart properties and methods*/}
		</div>
		);
	}
}

export default App;                              

Chart Customizations

By setting logarithmBase to a required number, you can achieve a logarithmic axis of required base. lineColor, lineThickness are the most commonly used customization options.

Note   For step by step instructions, follow our React Integration Tutorial

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