Customize Chart In React Native Chart Kit

Question

I want to edit the style of my chart as follows:

But I have come to this point:

Where the only thing I would be missing is to make the line a little sharper and not look like it has opacity and remove the fill from the graph so that only the line remains.

This is my code:

import React from 'react';
import { ScrollView, Dimensions, View, Text } from 'react-native';
import {
     LineChart,
     BarChart,
     PieChart,
     ProgressChart,
     ContributionGraph,
     StackedBarChart
   } from "react-native-chart-kit";

 import Styles from './Styles';

 export default function Charts(){
 const chartConfig = {
    backgroundGradientFromOpacity: 0,
    backgroundGradientToOpacity: 0,
    color: (opacity = 1) => `rgba(255, 255, 255, ${opacity})`,
    strokeWidth: 3, 
    barPercentage: 0.5,
    useShadowColorFromDataset: false,
    propsForBackgroundLines: {
        strokeDasharray: "",
        strokeOpacity: 0.0
    },

  };


return (
    <View>
        <ScrollView>
            <View style={[Styles.chart.card]}>
                <LineChart data={{
                                labels: ["January", "February", "March", "April", "May", "June"],
                                datasets: [
                                            {
                                                data: [
                                                    Math.random() * 100,
                                                    Math.random() * 100,
                                                    Math.random() * 100,
                                                    Math.random() * 100,
                                                    Math.random() * 100,
                                                    Math.random() * 100
                                                ]
                                            }
                                        ]
                                }}
                                width={Dimensions.get("window").width}
                                height={300}
                                yAxisLabel={undefined}
                                yAxisInterval={undefined}
                                chartConfig={chartConfig}
                                withHorizontalLabels={false}
                                bezier
                                hidePointsAtIndex={[0, 1, 2, 3, 4, 5]}
                                style={{
                                }}/>
            </View>
        </ScrollView> 
    </View>
    
  );
}

I'm using React Native with Expo and the React-Native-Chart-Kit library.

Also if there is any other library that allows a greater customization of charts much better.

Thanks for your help.

PsychoMx · Accepted Answer · 2024-06-19 15:50:37Z

0

I found the solution, I adjusted the chartConfig like this:

const chartConfig = {
    backgroundGradientFromOpacity: 0,
    backgroundGradientToOpacity: 0,
    color: () => `rgba(255, 255, 255, 1)`, /* Avoid opacity */
    strokeWidth: 3, 
    barPercentage: 0.5,
    useShadowColorFromDataset: false,
    propsForBackgroundLines: {
        strokeDasharray: "",
        strokeOpacity: 0.0
    },

    /* Adjusts the fill of the chart */
    fillShadowGradient: 'transparent',
    fillShadowGradientOpacity: 0,
    fillShadowGradientFromOffset: 0,
    fillShadowGradientTo: 'transparent',
    fillShadowGradientToOpacity: 0,

  };

Result:

answered Jun 19, 2024 at 15:50

PsychoMx

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