Hi,
how can I change a defined factor-variable?
Like adding levels, renaming existing levels or merge several levels
of a factor to one level?
For example; following factor-variable is given:
x <- factor(c("xyz1", "abc1", "xyz2", "abc2"))
How can I add the level fgh?
And how can I merge "xyz1" and "xyz2" to one level?
And how can I change the name?
Thanks for any help!
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