checking whether a word from a vector appears in the same row in different columns of a data frame...

Combining dataframe columns with same prefix...

R - If column contains a string from vector, append flag into another column...

Subsetting a data frame containing factors, NA values, and wildcards...

Capturing Group in R...

searching for texting and storing results in new columns within the dataframe...

Count the frequency of strings in a dataframe R...

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How to count the number multiple strings appear in another string list by group?...

How to specify to grepl to take into account a vowel irrespective of the accent...

Removing rows surrounding a grepl pattern match in R...

How to use multiple keywords in grepl...

Getting the rownumbers for all NA values of a column...

how to remove multiple rows that match more than 1 pattern in R?...

What's the difference between the str_detect function in stringer and grepl and grep?...

Can I use case_when (or anything else) to write with a non-static string?...

R grepl not giving desired result loading CSV...

Label a dataframe with if or ifelse and grepl...

Need help counting occurences with respect to multiple columns with multiple conditions (including a...

Joining two dataframes on a condition (grepl)...

Find if a string appear before another string...

How to filter via a logical expression that filters via a variable...

Determine which elements of a vector partially match a second vector, and which elements don't (...

Negative lookahead checking for absence of multiple patterns...

StringsR - catch correct numbers...

Reducing nested if else statements with grepl in R...

Reorder certain columns by a pattern within a data.table R...

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Regex with gsub and grepl in R: finding ',' not followed by a space...

str_detect with multiple strings (and not or) of the same kind using R...