Check for columns with only NA values

This function checks if there are any columns in the provided dataframe that contain only NA values. If such columns exist, their names are added to the provided collection.

check_na_columns(df, collection)

Arguments

df

A dataframe.

collection

A list to store the names of the columns with only NA values.

Value

The updated collection.

Examples

# Create a dataframe with some columns containing only NA values
df <- data.frame(a = c(1, NA, 3), b = c(NA, NA, NA), c = c(4, 5, 6))
collection <- checkmate::makeAssertCollection()
check_na_columns(df, collection)
#> Collection of 1 assertion.