keepif: keeps some rows in the dataset and drops the rest
In genvar: An Imperative Library for Data Manipulation

keeps some rows in the dataset and drops the rest

keepif(x)

`x`	a condition like: `var1==2` in which case observations that satisfy the condition are kept and all others are removed.

returns NULL, invisibly

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use(cars, clear=TRUE)
keepif(speed <= 20)
listif()

genvar documentation built on Jan. 21, 2020, 9:07 a.m.

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