vapr: Vector apply-to-column functions

Functions that apply expressions to the columns of input objects and return atomic vectors e.g., numeric (double), integer, character, logical.

vapc_chr: Iterate over input columns and return character(s)

vapc_dbl: Iterate over input columns and return numeric(s)

vapc_lgl: Iterate over input columns and return logical(s)

vapc_int: Iterate over input columns and return integer(s)

vapc_chr(.data, .f, ...)

vapc_dbl(.data, .f, ...)

vapc_lgl(.data, .f, ...)

vapc_int(.data, .f, ...)

Arguments

.data	Input object–must be two-dimensional (e.g., matrix, data.frame) –over which the second dimension (columns) will be iterated
.f	Action to apply to each element of .data. The action can be articulated in one of the four following ways: supplying a function object (e.g., mean) defining a function (in-line; e.g., function(x) mean(x)) specifying a formula-like call where '.x' is assumed to be the iterated over element of .data (e.g., ~ mean(.x)) providing a name or position of .data to return (e.g., 1, "varname", etc.)
...	Other values passed to function call.

Value

A character vector

A numeric vector

A logical vector

An integer vector

See also

lap dap

Other vap: vapr, vap