Hello all,
I have a data frame filled with senders and recipients. Some of the senders
have multiple rows with different recipients and I want to merge those
rows. For example I have
a...@email.com b...@email.com
a...@email.com c...@email.com d...@email.com
r...@email.com f...@email.com
r...@email.com h...@email.com
I want this to become
a...@email.com b...@email.com c...@email.com d...@email.com
r...@email.com f...@email.com h...@email.com
How would I go about doing this?
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