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How to detect if not all elements in vector are quoted

Say I have this vector:

vars <- c(1, "2")

Since those two elements are in the same vector, they are both coerced to character. Even if I treat them as independent elements on a list, once they are extracted from the same vector, they keep their type on the list:

sapply(as.list(vars), class)
[1] "character" "character"

What function would find that not all of the elements in vector vars are of type character? Maybe another way to put it is: what function would detect that not all of the elements on vector vars are quoted?

Solution

  • Instead of keeping in a vector, create a list which can have multiple type for each element

    vars <- list(1, "2")
sapply(vars, class)
#[1] "numeric"   "character"

    When we start this as a vector, there is no way to know which element should be numeric or character because both the elements once created are character