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A circular barplot is a barplot, with each bar displayed along a circle instead of a line. Thus, it is advised to have a good understanding of how barplots work before making them circular.  The benefits are: i/ your figure is more ‘eye catching’,

ii/ it allows a better use of the space than a long line. The drawback is that it is more difficult to read the difference between each bar size. Thus, circular barcharts make sense only if you have an huge number of bar to

display, and if you distinct differences between groups. Once more we will rely on the ggplot2 library for this section, that provides a really handy coord_polar() utility.

 

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Using coord_polar() of ggplot2


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