README.md

In camkay/quickselect: Quickly Select Data Frame Columns

quickselect

Quickly select columns from a data frame or tibble using regex. It is essentially a wrapper for select(matches("my_var")) from {dyplr} and {tidyselect}. It includes two functions match() and unmatch()

Installation

The development version of quickselect can be installed from GitHub with:

# install.packages("devtools")
devtools::install_github("camkay/quickselect")

Descriptions and Examples

match

match extracts columns in a data frame that match a specified regex string.

# look at example data
data_example
#>   group mach narc psyc  des  mor
#> 1     A   NA    2    3  100   10
#> 2     A    2    4    4  100   10
#> 3     B  300  500 1800    2  500
#> 4     B  200  700 2000   10 1000
#> 5     A    3   10    5 1000   20

# match columns that start with m
data_example %>%
  match("^m")
#>   mach  mor
#> 1   NA   10
#> 2    2   10
#> 3  300  500
#> 4  200 1000
#> 5    3   20

unmatch

unmatch extracts columns in a data frame that DO NOT match a specified regex string.

# look at example data
data_example
#>   group mach narc psyc  des  mor
#> 1     A   NA    2    3  100   10
#> 2     A    2    4    4  100   10
#> 3     B  300  500 1800    2  500
#> 4     B  200  700 2000   10 1000
#> 5     A    3   10    5 1000   20

# return columns that do not start with m
data_example %>%
  unmatch("^m")
#>   group narc psyc  des
#> 1     A    2    3  100
#> 2     A    4    4  100
#> 3     B  500 1800    2
#> 4     B  700 2000   10
#> 5     A   10    5 1000

camkay/quickselect documentation built on March 11, 2023, 12:57 a.m.