Ignore regular expression in grep pattern

Hello everyone please I have an issue with grep. I have an array of pattern which can have regular expression or not. when I grep the pattern on my corpus some of them are not found because they have regular expression. I don't know how to sove the problem. Can you help me please?

Could you please turn this into a self-contained reprex (short for reproducible example)? It will help us help you.


If you've never heard of a reprex before, you might want to start by reading the tidyverse.org help page. The reprex dos and don'ts are also useful.

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If you run into problems with access to your clipboard, you can specify an outfile for the reprex, and then copy and paste the contents into the forum.

reprex::reprex(input = "fruits_stringdist.R", outfile = "fruits_stringdist.md")

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You could use mapply to vectorized the pattern and fixed arguments.

  FUN      = grepl,
  pattern  = c("^cat", "^cat", "c.t", "c.t"),
  fixed    = c(FALSE, TRUE, FALSE, TRUE),
  MoreArgs = list(x = "^cat")
#  ^cat  ^cat   c.t   c.t 

I'd suggest writing a function to handle this for you. How that functions works depends on your data and desired output.

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