Hi R users,
suppose I have two vectors,
> x=c(1,2,3,4,5)
> y=c('a','b','c','a','c')
How can I get a data.frame like this?
> xy
count
a 5
b 2
c 8
I know a few ways to fulfill the task. However, I have a huge number
of this kind calculations, so I'd like an efficient solution. Thanks
--
Best,
Zhenjiang
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