Section 1.1: Customizing Bar Colors

One of the key features of the VictoryStack component is its ability to modify the colors of the bars through the colorScale property. For example, you can configure it like this:

import React from "react";

import {

VictoryBar,

VictoryChart,

VictoryAxis,

VictoryStack,

VictoryTheme

} from "victory";

const data2018 = [

{ quarter: 1, earnings: 13000 },

{ quarter: 2, earnings: 16500 },

{ quarter: 3, earnings: 14250 },

{ quarter: 4, earnings: 19000 }

];

// ... additional data for other years

By integrating this code, we can visualize earnings over various quarters from different years.

The first video titled "Animated Bar Charts with Expo (React Native), Victory Native, and Skia" provides a comprehensive look at creating animated bar charts using Victory and other libraries in React Native.

Section 1.2: Adding Bar Labels

To enhance our bar charts, we can add labels by utilizing the labelComponent within our chart. Here is an example of how to implement it:

import React from "react";

import { Bar, VictoryBar, VictoryChart, VictoryTooltip } from "victory";

const data = [

{ x: 1, y: 13000 },

{ x: 2, y: 16500 },

{ x: 3, y: 14250 },

{ x: 4, y: 19000 }

];

export default function App() {

return (

<VictoryChart>

<VictoryBar

data={data}

labels={({ datum }) => y: ${datum.y}}

labelComponent={<VictoryTooltip />}

dataComponent={<VictoryBar />}

/>

</VictoryChart>

);

}

This code snippet configures the bar chart to display values when the user hovers over the bars.

Section 1.3: Styling Bar Labels

For a more visually appealing design, we can incorporate styled labels using the VictoryLabel component. Here's how to do it:

import React from "react";

import { Bar, VictoryBar, VictoryChart, VictoryLabel } from "victory";

const data = [

{ x: 1, y: 13000, label: "first label" },

{ x: 2, y: 16500, label: "second label" },

{ x: 3, y: 14250, label: "3rd label" },

{ x: 4, y: 19000, label: "4th label" }

];

export default function App() {

return (

<VictoryChart>

<VictoryBar

data={data}

labels={({ datum }) => y: ${datum.y}}

labelComponent={<VictoryLabel backgroundStyle={{ fill: "lightgray" }} backgroundPadding={5} />}

dataComponent={<VictoryBar />}

/>

</VictoryChart>

);

}

This example shows how to add a background to labels for improved readability.