Popularity of Programming Languages

What programming languages do data scientists use?

This was one of the questions in the State of Data Science Reports published by Anaconda between 2020 and 2022. This data story shows the answers to this question.

Create a vizzu-player element that will contain the rendered story.

<vizzu-player controller></vizzu-player>

In a script module element:

// Import VizzuPlayer
import VizzuPlayer from 'https://cdn.jsdelivr.net/npm/vizzu-story@0.7/dist/vizzu-story.min.js'
import Csv2Js from 'https://vizzu-story.vizzuhq.com/0.7/assets/javascripts/csv2js.js'

// Get the created element
const vp = document.querySelector('vizzu-player')

// Create data object
const dataLoaded = Csv2Js.csv('./proglangs.csv', { dimensions: ['Year'], units: { Value: '%' } })

dataLoaded.then((data) => {
    // Each slide here is a page in the final interactive story
    const slides = [
        {
            filter: (record) => record.Year === '2022',
            style: {
                logo: { width: '5em' },
                plot: {
                    xAxis: { title: { color: '#00000000' } },
                    paddingLeft: '2.5em',
                    marker: {
                        colorPalette:
                            '#3DAE2BFF ' + '#00833EFF ' + '#00A19BFF ' + '#0075A9FF ' + '#003764FF',
                        minLightness: 0,
                        maxLightness: 0.4
                    }
                },
                fontSize: '0.8em'
            },
            config: {
                x: ['Popularity', 'Value'],
                y: ['Language', 'Year', 'Lang_year'],
                color: 'Popularity',
                label: 'Value',
                align: 'stretch',
                title: 'Use of programming languages by data scientists in 2022',
                lightness: 'Year',
                legend: 'color'
            }
        },
        {
            style: { plot: { xAxis: { label: { color: '#00000000' } } } },
            config: {
                split: true,
                align: 'min',
                title: 'Python is always or frequently used by 58%'
            }
        },

        [
            {
                style: { plot: { xAxis: { label: { color: '#999999FF' } } } },
                config: { split: false, align: 'stretch' }
            },
            {
                filter: (record) =>
                    (record.Popularity === 'Always' || record.Popularity === 'Frequently') &&
                    record.Year === '2022',
                config: { x: { range: { max: 100 } }, align: 'min' }
            },
            {
                config: {
                    sort: 'byValue',
                    title: 'Python & SQL are the most popular by a huge margin'
                }
            }
        ],
        [
            {
                config: {
                    sort: 'none',
                    title: "Let's focus on the six languages with data since 2020"
                }
            },
            {
                filter: (record) =>
                    (record.Popularity === 'Always' || record.Popularity === 'Frequently') &&
                    (record.Language === 'R' ||
                        record.Language === 'Python' ||
                        record.Language === 'JavaScript' ||
                        record.Language === 'Java' ||
                        record.Language === 'C#' ||
                        record.Language === 'C/C++') &&
                    record.Year === '2022'
            },
            {
                config: {
                    y: ['Lang_year', 'Year'],
                    x: ['Popularity', 'Language', 'Value']
                }
            }
        ],
        [
            {
                filter: (record) =>
                    (record.Popularity === 'Always' || record.Popularity === 'Frequently') &&
                    (record.Language === 'R' ||
                        record.Language === 'Python' ||
                        record.Language === 'JavaScript' ||
                        record.Language === 'Java' ||
                        record.Language === 'C#' ||
                        record.Language === 'C/C++') &&
                    record.Year !== '2020'
            },
            {
                filter: (record) =>
                    (record.Popularity === 'Always' || record.Popularity === 'Frequently') &&
                    (record.Language === 'R' ||
                        record.Language === 'Python' ||
                        record.Language === 'JavaScript' ||
                        record.Language === 'Java' ||
                        record.Language === 'C#' ||
                        record.Language === 'C/C++'),
                config: {
                    title: 'C/C++, C#, Java and Javascript are gaining popularity'
                }
            }
        ]
    ]

    // Create story configuration object, add data and slides to it
    const story = {
        data,
        slides
    }

    // Set the size of the HTML element
    vp.style.cssText = 'width: 100%; height: 600px;'

    // Set up the created element with the configuration object
    vp.slides = story
    vp.initializing.then((chart) => {
        // Switch on the tooltip that appears
        // when the user hovers the mouse over a chart element
        chart.feature('tooltip', true)

        // Set a handler that prevents showing specific elements
        chart.on('plot-marker-label-draw', (event) => {
            if (event.detail.text.split('%')[0] < 5) event.preventDefault()
        })
    })
})