dh.dropCols: Removes columns from a serverside data frame

In lifecycle-project/ds-helper: Helper Functions for Use with 'DataSHIELD'

Removes columns from a serverside data frame

Description

Often we want to remove variables from a dataframe. This function allows you to specify the variables you either want to remove or keep and and creates a new dataframe with only the required variables.

Usage

dh.dropCols(
  df = NULL,
  vars = NULL,
  new_obj = NULL,
  type = NULL,
  conns = NULL,
  checks = TRUE,
  new_df_name = NULL
)

Arguments

df	Character specifying a server-side data frame.
vars	Character vector specifying columns within 'df' to be removed or kept.
new_obj	Optionally, character specifying name for new server-side data frame. Default is to return original data frame with columns removed.
type	Character specifying how to treat 'vars'. If "remove" these variables are removed from the data frame, if "keep" these variables are kept in the data frame and all others are removed.
conns	DataSHIELD connections object.
checks	Logical; if TRUE checks are performed prior to running the function. Default is TRUE.
new_df_name	Retired argument name. Please use ‘new_obj’ instead.

Value

Server-side data frame the specified subset of columns.

See Also

Other data manipulation functions: dh.makeAgePolys(), dh.makeIQR(), dh.makeStrata(), dh.quartileSplit(), dh.renameVars(), dh.tidyEnv(), dh.zByGroup()

lifecycle-project/ds-helper documentation built on Oct. 27, 2023, 2:08 p.m.