Check if a data frame contains negative values.

This function checks if a data frame contains negative values and returns their indices if any are found.

check_for_negative_values(df)

Arguments

df

The data frame to check for negative values.

Value

If negative values are found, the function returns their indices as an array index object. If no negative values are found, NULL is returned.

Examples

df <- data.frame(a = c(1, 2, 3), b = c(-1, 0, 1))
check_for_negative_values(df)
#> Data frame contains negative values.
#>      row col
#> [1,]   1   2
# [1] "Data frame contains negative values."
#      row col
# [1,]   2   1"