dm_select {dm} R Documentation

## Select columns

### Description

Select columns of your dm using syntax that is similar to dplyr::select().

### Usage

dm_select(dm, table, ...)


### Arguments

 dm A dm object. table A table in the dm. ... One or more unquoted expressions separated by commas. You can treat variable names as if they were positions, and use expressions like x:y to select the ranges of variables. Use named arguments, e.g. new_name = old_name, to rename the selected variables. The arguments in ... are automatically quoted and evaluated in a context where column names represent column positions. They also support unquoting and splicing. See vignette("programming", package = "dplyr") for an introduction to those concepts. See select helpers for more details, and the examples about tidyselect helpers, such as starts_with(), everything(), ...

### Details

If key columns are renamed, then the meta-information of the dm is updated accordingly. If key columns are removed, then all related relations are dropped as well.

### Value

An updated dm with the columns of table reduced and/or renamed.

### Examples


dm_nycflights13() %>%
dm_select(airports, code = faa, altitude = alt)



[Package dm version 0.2.8 Index]