Venn diagrams are often used for datas with less than 5 sets
i found some figures are insteresting, but don't know how to draw figures like this:
Venn diagrams are often used for datas with less than 5 sets
i found some figures are insteresting, but don't know how to draw figures like this:
venn diagram:
simple: http://www.pangloss.com/seidel/Protocols/venn.cgi
It's worse than that: it is impossible to draw exact, area-proportional Venn (Euler) diagrams with circles for even three sets, though approximations are widely available. By loosening the circular constraint of an Euler diagram, a group at Microsoft Research came up with a fan-shaped diagram (also called a "ConSet") that provides precise area-proportionality. Their paper describes the issue in more detail: http://research.microsoft.com/pubs/64283/iwc2007-conset.pdf
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Venn diagrams are good when it is visible all possible overlaps between every set. It gets tricky once you have more than 3-4 sets, maximum of 11 can be done - http://www.wired.co.uk/news/archive/2012-08/10/11-set-venn-diagram
For more than 4 sets I use VennMaster which does a reasonable job of approximating proportional overlap. See Tool To Generate Proportional Venn Diagrams? for all kinds of other Venn diagram suggestions.