Sort in descending order

Hi R users:
I want to know how can I easily sort in descending order a
whole data frame by one or several variables.
Thank you very much for your help.

Kenneth Cabrera
krcabrer at perseus.unalmed.edu.co
krcabrer at epm.net.co
Universidad Nacional de Colombia, Sede Medell?n

rev(sort(x))


Emmanuel Paradis
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