R: How can I replace let's say the 5th element within a string?

Question

I would like to convert the a string like be33szfuhm100060 into BESZFUHM0060.

In order to replace the small letters with capital letters I\'ve so far used the gsub f

Answer 1

You can use substring to remove the third and fourth elements.

x <- "be33szfuhm100060"
paste(substring(x, 1, 2), substring(x, 5), sep = "")