Construct an extended column specification

Extended column specifications are used in the read_interlaced_*() family of functions in the col_types argument to specify the value and missing reason channel types.

Usage

x_cols(..., .default = v_col_guess())

x_cols_only(...)

Arguments

...

a named argument list of extended collectors or value collectors.

.default

a default value collector

Value

a new extended column specification

Details

Like readr::cols(), x_cols() includes all the columns in the input data, guessing the column types as the default, and creating missing reason channels according to the na = argument in the read function. x_cols_only() only includes the columns you specify, like readr::cols_only(). In general, you can substitute list() for x_cols() without changing the behavior.

See also

readr::cols(), readr::cols_only()