An S4 class to represent multiple sets.
This class is adopted from ‘RVenn'. Since 'RVenn' doesn’t export this class, I have to copy its codes hereafter to use it.
sets
A list
object containing vectors in the same type.
names
The names of the sets
if it has names. If the list
doesn't have names, the sets will be named as "Set_1", "Set_2", "Set_3" and
so on.
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