CODEWITHSUNDEEP
rregexdplyr
Catherine Laing
Catherine Laing

Reputation: 657

Issue with regular expressions in dplyr using stri_detect_regex

I'm running a script that I wrote about six months ago which, until now, has worked perfectly. The data looks something like this:

 Speaker       Consonant
  cat              c
  dog              g 
  pig              h
  cat              c

And my code should create a new column, 'match', that decides whether there is a match between the speaker and the target consonant:

 Speaker       Consonant     Match
  cat              c           T
  dog              g           T
  pig              h           F
  cat              c           T

The code I ran previously, using dplyr(), was 

df %>% mutate(Match = stri_detect_regex(df$Speaker, df$Consonant))

Now when I run this I get the following error message:

Error in mutate_impl(.data, dots) : 
      Evaluation error: Missing closing bracket on a bracket expression. (U_REGEX_MISSING_CLOSE_BRACKET).

Note that my actual code is more complex, with 12 different commands in stri_detect_regex. But it all worked fine previously, and I get this error message even if I just run the first line of the code, as shown in the example code above.

Upvotes: 0

Views: 222

Answers (1)

davsjob
davsjob

Reputation: 1950

I used stringr instead. Seems to work fine.

df <- data.frame(Speaker = c("cat", "dog", "pig", "cat"),
                 Consonant = c("c", "g" , "h", "c"))

library(stringr)
df %>% mutate(Match = str_detect(Speaker, Consonant))

Update: Your code also works for me with stringi

Upvotes: 1

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