Empty numeric value in a numeric vector in R

Question

I want to create a numeric vector in R with a placeholder. Just like in a chracter vector like:

characterVec <- c("a", "b", "", "d")

This gives me a characterVec vector with a length of 4.

How can I create a numeric vector with a length of 4, but still has one empty value? For example, I would like to know what do I put into the question mark in the following vector.

numericVec <- c(1, 2, ?, 4)

`numeric` creates numeric vector of given length (`numeric(4)`). However, I don't understand what you mean by *empty numeric value*. Is it `0`, `NA`? — pogibas, Sep 17 '18 at 08:54
This answer might be what you want: https://stackoverflow.com/a/24849859/8675075 — Paul, Sep 17 '18 at 09:14

score 0 · Accepted Answer · answered Sep 17 '18 at 09:21

0

If I'm understanding your question properly, you can use a named vector to create a data dictionary linking letters to corresponding numbers:

# data dictionary
dat <- 1:26
names(dat) <- letters

then map dictionary onto your vector

characterVec <- c("a", "b", "", "d")
numVec <- dat[characterVec]

gives

   a    b <NA>    d 
   1    2   NA    4

You can remove the vector names with unname():

numVec <- unname(dat[characterVec])

answered Sep 17 '18 at 09:21

Paul

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Thanks @Paul and, that will be a solution that gets the job done in my case :) – AT90 Sep 17 '18 at 09:25

Empty numeric value in a numeric vector in R

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