R: Select subset of dataframe by non-unique ids
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Published on 2010-04-02T19:50:20Z
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Suppose I have a dataframe like this one:
df <- data.frame (id = c("a", "b", "a", "c", "e", "d", "e"), n=1:7)
and a vector with ids like this one:
v <- c("a", "b")
How can I select the rows of the dataframe that match the ids in v? I can't use the id column for rownames because they are not unique.
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