xefun (version 0.1.5)

cols_type: columns by type

Description

The columns name of a data frame by given data types.

Usage

cols_type(dt, type)

Arguments

dt

a data frame.

type

a string of data types, available values including character, numeric, double, integer, logical, factor, datetime.

Examples

dt = data.frame(a = sample(0:9, 6), b = sample(letters, 6),
                c = Sys.Date()-1:6, d = Sys.time() - 1:6)
dt
# numeric columns
cols_type(dt, 'numeric')
# or
cols_type(dt, 'n')

# numeric and character columns
cols_type(dt, c('character', 'numeric'))
# or
cols_type(dt, c('c', 'n'))

# date time columns
cols_type(dt, 'datetime')