R data frame string contains: Does column 1 contain column 2?

Question

I have a dataframe with two columns:

  Surname                Email
1   house  greghouse@gmail.com
2  wilson johnwatson@gmail.com

I want to cre

Answer 1

Here's a base R option using Vectorize with grepl:

df1$CheckEmail <- Vectorize(grepl)(df1$Surname, df1$Email)