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 approach using mapply with grepl:

transform(df, CheckEmail = mapply(grepl, Surname, Email))
#  Surname                Email CheckEmail
#1   house  greghouse@gmail.com       TRUE
#2  wilson johnwatson@gmail.com      FALSE