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Impact: How much a visualisation makes you take notice of it
Accuracy: How well it portrays the true data behind it
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This chart shows contribution towards total UK Income Tax that each income group (broken down by percentage) makes. From this, we can see that taxpayers with the highest 10% of income paid just over half of all Income Tax for the time period shown. Connectors between the columns therefore indicate each group's relative contribution.
When using colours to portray data values or types, ensure that the colors used are accessible to all users. Online tools such as ColorBrewer (www.colorbrewer.org) can help identify issues with colours used.
100% stacked bar-charts can mislead users into thinking the data values represented by the different bars are the same (as the heights of the bars are 100%). This needs to be made clear on the visualisation.
Create your own
100% stacked bar charts can be created in a range of standard data applications such as Excel.
Scarf charts are a type of stacked bar-chart, and can be created in a range of standard data applications such as Excel.
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