[R] union of two sets are smaller than one set?
e@ @end|ng |rom enr|co@chum@nn@net
Sun Jan 31 22:15:44 CET 2021
On Sun, 31 Jan 2021, Martin Møller Skarbiniks Pedersen writes:
> This is really puzzling me and when I try to make a small example
> everything works like expected.
> The problem:
> I got these two large vectors of strings.
> chr [1:766608] "0.dk" ...
> chr [1:59387] "043.dk" "0606.dk" "0618.dk" "0888.dk" "0iq.dk" "0it.dk" ...
> And I need to create the union-set of s1 and s2.
> I expect the size of the union-set to be between 766608 and 766608+59387.
> However it is 681193 which is less that number of elements in s1!
>> length(base::union(s1, s2))
>  681193
> Any hints?
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