Word Analysis using R studio

To clarify, R is the language, and RStudio is just the IDE (see FAQ below for disambiguation). Since this question isn't about the IDE itself, I'm going to move it to General.

What you're describing sounds like a good use-case for grepl() or a similar string-matching function which:

search for matches to argument pattern within each element of a character vector

str_detect() from the stringr package does ~ the same thing.

The chapter on strings from R for Data Science might be worth looking at.