Pictorial stacked percentage chart
There is a major misleading aspect to this visualisation: The use of varying widths for the two bars suggests to the viewer that the coke can produces significantly more CO2 than the smoothie bottle. Examination of the text shows that this is not the case.
- 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.
- Using pictures to show data values can be misleading, where different images have different areas or volumes. Wider images can lead users to think that the data values are larger, even where height is the only dimension used to represent data values.
- 100% stacked bar charts can be created in a range of standard data applications such as Excel.
- Pictorial versions of standard charts can be created in a range of standard data applications such as Excel For example in Excel, setup the chart and 'Format data series -> Fill' with Pattern or texture fill, and select a file image to use as a pictorial (you'll need to have setup the image first).