How can I convert y vector into a numeric vector.
y <- c("1+2", "0101", "5*5")
when I use
as.numeric(Y)
OUTPUT
Na 101 NA
2 Answers
The following code
sapply(y, function(txt) eval(parse(text=txt)))
should to the work.
The problem is quite deep and you need to know about metaprogramming.
The problem with as.numeric is, that it only converts a string to a numeric, if the string only consists of numbers and one dot. Everything else is converted to NA. In your case, "1+2" contains a plus, hence NA. Or "5*5" contains a multiplication, hence NA. To say R that it should "perform the operation given by a string", you need eval and parse.
An option with map
library(purrr)
map_dbl(y, ~ eval(rlang::parse_expr(.x)))
#[1] 3 101 25
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