R: Extract the only distinct value from a vector

only {tidyplus}

R Documentation

Extract the only distinct value from a vector

Extracts the only distinct value from an atomic vector or throws an informative error if no values or multiple distinct values.

only(x, na_rm = FALSE)

`x`	An atomic vector.
`na_rm`	A flag indicating whether to exclude missing values.

only() is useful when summarizing a vector by group while checking the assumption that it is constant within the group.

The only distinct value from a vector otherwise throws an error.

only(c(1, 1))
only(c(NA, NA))
only(c(1, 1, NA), na_rm = TRUE)
try(only(character(0)))
try(only(c(1, NA)))
try(only(c(1, 2)))

[Package tidyplus version 0.0.2 Index]