Fixing case problems

Finally, you might want to transform strings to a common case. You've seen you can use str_to_upper() and str_to_lower(), but there is also str_to_title() which transforms to title case, in which every word starts with a capital letter.

This is another situation where stringi functions offer slightly more functionality than the stringr functions. The stringi function stri_trans_totitle() allows a specification of the type which, by default, is "word", resulting in title case, but can also be "sentence" to give sentence case: only the first word in each sentence is capitalized.

Try outputting the catcidents in a consistent case.

This exercise is part of the course

String Manipulation with stringr in R

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Exercise instructions

A character vector of cat-related accidents has been pre-defined in your workspace as catcidents.

Store the first five elements of catcidents as cat5.
Use writeLines() to display cat5.
Repeat but now pass cat5 transformed to title case with str_to_title().
Try again using stri_trans_totitle() instead. This should be identical to str_to_title().
Finally, display the first 5 elements of cat5 transformed to sentence case, by passing the type argument to stri_trans_totitle().

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

library(stringi)

# Get first five catcidents
cat5 <- ___

# Take a look at original
___

# Transform to title case
___

# Transform to title case with stringi
___

# Transform to sentence case with stringi
___

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