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transmute(). Because each element is a list, use map functions within a column function to manipulate each element. Work with Lists a b c y z 2 a b FALSE b c TRUE a b c TRUE a b c 3 a b c TRUE append(x, values, a"er = length(x)) Add values to end of list. append(x, list(d = 1)) prepend(x, values, before = 1) Add values to start of list. prepend ...

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