How to coerce a list object to type 'double'

Question

The code:

a <- structure(list(`X$Days` = c(\"10\", \"38\", \"66\", \"101\", \"129\", \"185\", \"283\", 
                                 \"374\")), .Names         


        

Answer 1

There are problems with some data. Consider:

as.double(as.character("2.e")) # This results in 2

Another solution:

get_numbers <- function(X) {
    X[toupper(X) != tolower(X)] <- NA
    return(as.double(as.character(X)))
}