Custom ifelse function that evaluates missing (NA) values. If the logical argument (x) compares to a value that is `NA`, it is set to `FALSE`
if_else2(x, a, b)
a or b based on the evaluation of x
unlike the base ifelse() function, if_else2() is able to evaluate NA as either a or b. In base ifelse(), anything compared to NA will produce NA, which can break a function. When dealing with large datasets like the CCHS, there are many missing (NA) values. That means a special ifelse function like if_else2() is needed in order for other functions to not break