na.rm is similar to na.omit but allows to specify a list of
variables to take into account.
a data frame
a list of variables
v is not specified, the result of
na.rm will be the same as
na.omit. If a list of variables is specified through
observations with a missing value (
NA) for one of the specified
variables will be removed from
x. See examples.
Joseph Larmarange <[email protected]>
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