EDCimport (version 0.5.2)

select_distinct: Select only distinct columns

Description

Select all columns that has only one level for a given grouping scope. Useful when dealing with mixed datasets containing both long data and repeated short data.

Usage

select_distinct(df, .by)

Value

df with less columns

Arguments

df

a dataframe

.by

optional grouping columns

Examples

tm = edc_example_ae()
tm$ae %>% names
tm$ae %>% select_distinct() %>% names
tm$ae %>% select_distinct(.by=subjid) %>% names