regex in r

# Example string
text <- "The quick brown fox jumps over the lazy dog."

# Step 1: Load the 'stringr' library
library(stringr)

# Step 2: Define a regular expression pattern
pattern <- "[aeiou]"

# Step 3: Use the 'str_extract_all' function to find all matches
matches <- str_extract_all(text, pattern)

# Step 4: Flatten the list of matches into a single vector
matches <- unlist(matches)

# Step 5: Print the result
print(matches)