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Changing dimensions

The simplest of dimension-changing operations are aggregate and drill-down. These features basically mean that you either add or remove an additional dimension to/from an axis or another channel.

Let’s aggregate together the elements by getting the Genres dimension off the x-axis. By taking it off the chart, only one chart element remains for every color, and Vizzu automatically calculates and shows the aggregate value of the elements.

Info - How to setup Vizzu

In HTML, create a placeholder element that will contain the rendered chart.

<html>
 <body>
  <div id="myVizzu">
  </div>
 </body>
</html>

In JavaScript, initialize and configure the chart:

import Vizzu from 'https://cdn.jsdelivr.net/npm/vizzu@0.9/dist/vizzu.min.js'
import data from 'https://lib.vizzuhq.com/0.9/assets/data/music_data.js'

let chart = new Vizzu('myVizzu')

await chart.initializing

chart.animate({
    data: data,
    config: {
        channels: {
            y: {
                set: ['Popularity', 'Kinds']
            },
            x: {
                set: ['Genres']
            },
            color: {
                set: ['Kinds']
            },
            label: {
                set: ['Popularity']
            },
        },
    }
})

chart.animate({
    config: {
        channels: {
            x: {
                set: null
            }
        }
    }
})

When you simultaneously add and remove dimensions, the partitioning of the underlying data to markers on the chart changes. There are multiple ways to transition through these kinds of operations using.

By default, the markers are aggregated to the common base of the two states, then drilled down to the target state, as shown below.

chart.animate({
    config: {
        channels: {
            y: {
                detach: ['Kinds']
            },
            x: {
                set: ['Genres']
            },
            color: {
                set: null
            },
        }
    }
})

You can change this setting and drill down to the union of the two states instead, and then aggregate to the target state:

chart.animate({
    config: {
        channels: {
            x: {
                detach: ['Genres'],
                attach: ['Kinds']
            }
        }
    }
}, {
    regroupStrategy: 'drilldown'
})

There is also the option to fade the chart between the states:

chart.animate({
    config: {
        channels: {
            x: {
                detach: ['Kinds'],
                attach: ['Genres']
            }
        }
    }
}, {
    regroupStrategy: 'fade'
})

To simply drill down, the same dimension is put back on the y-axis.

chart.animate({
    config: {
        channels: {
            y: {
                attach: ['Kinds']
            },
            color: {
                set: ['Kinds']
            }
        }
    }
})