... | ... | @@ -129,4 +129,10 @@ Since changes of the resolution change the values linearly, this table can be us |
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</tbody>
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</table>
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So the best arragement depends on how much categories have to be depicted in the chart and which value resolution is desired. |
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So the best arragement depends on how much categories have to be depicted in the chart and which value resolution is desired.
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### Complex bar charts
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When it comes to displaying multiple sets of data in a single bar chart, there is the possibility to group the bars into categories or to stack them. However, stacked bar charts will not be discussed further or implemented, since they tend not to be well known amongst visually impaired users. In a recent evaluation conducted with a wide heterogenous set of 48 participants, "most participants were unfamiliar with stacked bars (69%). [...] The meaning of stacked bar charts can be misunderstood. Participants reported high mental effort when analysing data in stacked bar charts." (Engel & Weber, 2019, p.13)
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1. Engel, Christin & Weber, Gerhard. (2019). User Study: A Detailed View on the Effectiveness and Design of Tactile Charts. 10.1007/978-3-030-29381-9_5. |
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