How can I extract the four first numbers from a variable? R

Question

Well, I got a variable that shows numbers like this one: 13015064000992062, and I need to extract the four first numbers and put it in another column. In this case, it will be 1301.

A friend told me that it was using stringr library, but he can't remember the code.

I am working with a data frame. So I need to get a new variable called "canton", that are the four first digits from 'Identificador'

So it looks like this:

score 3 · Accepted Answer · answered Nov 09 '20 at 23:37

3

We can use substr

 permMan19$newcol <- substr(permMan19$identificador, 1, 4)

answered Nov 09 '20 at 23:37

akrun

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How can I extract the four first numbers from a variable? R

1 Answers1